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Current Electricity

116 Questions Start NEET Test
All Exams NEET AIIMS
2016 Q51 NEET MCQ
10 Mar 2026
The charge flowing through a resistance R varies with time t is Q = at $-$ bt2, where $a$ and $b$ are positive constants. The total heat produced in R is
A.
${{{a^3}R} \over {2b}}$
B.
${{{a^3}R} \over {b}}$
C.
${{{a^3}R} \over {6b}}$
D.
${{{a^3}R} \over {3b}}$
2016 Q52 NEET MCQ
10 Mar 2026
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is
A.
3 : 4
B.
3 : 2
C.
5 : 1
D.
5 : 4
2015 Q53 NEET MCQ
10 Mar 2026
Two metal wires of identical dimensions are connected in series. If $\sigma $1 and $\sigma $2 are the conductivity of the combination is
A.
${{{\sigma _1} + {\sigma _2}} \over {{\sigma _1}{\sigma _2}}}$
B.
${{{\sigma _1}{\sigma _2}} \over {{\sigma _1} + {\sigma _2}}}$
C.
${{2{\sigma _1}{\sigma _2}} \over {{\sigma _1} + {\sigma _2}}}$
D.
${{{\sigma _1} + {\sigma _2}} \over {2{\sigma _1}{\sigma _2}}}$
2015 Q54 NEET MCQ
10 Mar 2026
A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be
A.
2A
B.
1A
C.
0.5 A
D.
0.25 A
2015 Q55 NEET MCQ
10 Mar 2026
A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E0 and a resistance r1. An unknown e.m.f. E is balanced at a length $l$ of the potentiometer wire. The e.m.f. E will be given by
A.
${{{E_0}l} \over L}$
B.
${{L{E_0}r} \over {\left( {r + {r_1}} \right)l}}$
C.
${{L{E_0}r} \over {l{r_1}}}$
D.
${{{E_0}r} \over {\left( {r + {r_1}} \right)}}.{l \over L}$
2015 Q56 NEET MCQ
10 Mar 2026
Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is
A.
drift velocity
B.
electric field
C.
current density
D.
current
2015 Q57 NEET MCQ
10 Mar 2026
A potentiometer wire has length 4 m and resistance 8 $\Omega $. The resistance that must be connected in series with the wire and an accumulator of e.m.f. 2 V, so as to get a potential gradient 1 mV per cm on the wire is
A.
44 $\Omega $
B.
48 $\Omega $
C.
32 $\Omega $
D.
40 $\Omega $
2015 Q58 NEET MCQ
10 Mar 2026
A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are VA, VB and VC respectively, Then

AIPMT 2015 Cancelled Paper Physics - Current Electricity Question 107 English
A.
VA = VB $ \ne $ VC
B.
VA $ \ne $ VB $ \ne $ VC
C.
VA = VB = VC
D.
VA $ \ne $ VB = VC
2014 Q59 NEET MCQ
10 Mar 2026
The resistances in the two arms of the meter bridge are 5 $\Omega $ and R$\Omega $ respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6$l$1. The resistance R is

AIPMT 2014 Physics - Current Electricity Question 104 English
A.
10 $\Omega $
B.
15 $\Omega $
C.
20 $\Omega $
D.
25 $\Omega $
2014 Q60 NEET MCQ
10 Mar 2026
Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5 $\Omega $. The power loss in the wire is
A.
19.2 W
B.
19.2 kW
C.
19.2 J
D.
12.2 kW
2014 Q61 NEET MCQ
10 Mar 2026
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance R, connected across the given cell, has values of (i) infinity,    (ii) 9.5 $\Omega $
the balancing lengths on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is
A.
0.25 $\Omega $
B.
0.95 $\Omega $
C.
0.5 $\Omega $
D.
0.75 $\Omega $
2013 Q62 NEET MCQ
10 Mar 2026
Ten identical cells connected in series are needed to heat a wire of length one meter and radius 'r' by 10oC in time 't'. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time 't' ?
A.
20
B.
30
C.
40
D.
10
2013 Q63 NEET MCQ
10 Mar 2026
Two rods are joined end to end, as shown. Both have a cross-sectional area of 0.01 cm2. Each is 1 meter long. One rod is of copper with a resistivity of 1.7 $ \times $ 10$-$6 ohm-centimeter, the other is of iron with a resistivity of 10$-$5 ohm-centimeter.
NEET 2013 (Karnataka) Physics - Current Electricity Question 98 English
How much voltage is required to produce a current of 1 ampere in the rods?
A.
0.00145 V
B.
0.0145 V
C.
1.7 $ \times $ 10$-$6 V
D.
0.117 V
2013 Q64 NEET MCQ
10 Mar 2026
A 12 cm wire is given a shape of a right angled triangle ABC having sides 3 cm, 4 cm and 5 cm as shown in the figure. The resistance between two ends (AB, BC, CA) of the respective sides are measuread one by one ratio
NEET 2013 (Karnataka) Physics - Current Electricity Question 97 English
A.
9 : 16 : 25
B.
27 : 32 : 35
C.
21 : 24 : 25
D.
3 : 4 : 5
2013 Q65 NEET MCQ
10 Mar 2026
The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the celll will be
A.
0.1 A
B.
2.0 A
C.
1.0 A
D.
0.2 A
2013 Q66 NEET MCQ
10 Mar 2026
A wire of resistance 4 $\Omega $ is stretched to twice its original length. The resistance of stretched wire would be
A.
8 $\Omega $
B.
16 $\Omega $
C.
2 $\Omega $
D.
4 $\Omega $
2013 Q67 NEET MCQ
10 Mar 2026
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 $\Omega $ is
A.
0.8 $\Omega $
B.
1.0 $\Omega $
C.
0.2 $\Omega $
D.
0.5 $\Omega $
2012 Q68 NEET MCQ
10 Mar 2026
A cell having an emf $\varepsilon $ and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by
A.
AIPMT 2012 Mains Physics - Current Electricity Question 92 English Option 1
B.
AIPMT 2012 Mains Physics - Current Electricity Question 92 English Option 2
C.
AIPMT 2012 Mains Physics - Current Electricity Question 92 English Option 3
D.
AIPMT 2012 Mains Physics - Current Electricity Question 92 English Option 4
2012 Q69 NEET MCQ
10 Mar 2026
The power dissipated in the circuit shown in the figure is 30 watts. The value of R is
AIPMT 2012 Mains Physics - Current Electricity Question 91 English
A.
20 $\Omega $
B.
15 $\Omega $
C.
10 $\Omega $
D.
30 $\Omega $
2012 Q70 NEET MCQ
10 Mar 2026
In the circuit shown the cells A and B have negligible resistances. For VA = 12 V, R1 = 500 $\Omega $ and R = 100 $\Omega $ the galvanometer (G) shows no deflection. The value of Vs is

AIPMT 2012 Prelims Physics - Current Electricity Question 95 English
A.
4 V
B.
2 V
C.
12 V
D.
6 V
2012 Q71 NEET MCQ
10 Mar 2026
If voltage across a bulb rated 220 volt-100 watt drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is
A.
20%
B.
2.5%
C.
5%
D.
10%
2012 Q72 NEET MCQ
10 Mar 2026
A ring is made of a wire having a resistance R0 = 12 $\Omega $. Find the points A and B, as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub circuit between these point is equal to ${8 \over 3}\Omega $.
AIPMT 2012 Prelims Physics - Current Electricity Question 94 English
A.
${{{l_1}} \over {{l_2}}} = {5 \over 8}$
B.
${{{l_1}} \over {{l_2}}} = {1 \over 3}$
C.
${{{l_1}} \over {{l_2}}} = {3 \over 8}$
D.
${{{l_1}} \over {{l_2}}} = {1 \over 2}$
2011 Q73 NEET MCQ
10 Mar 2026
In the circuit shown in the figure, if the potential at point A is taken to be zero, the potential at point B is

AIPMT 2011 Mains Physics - Current Electricity Question 88 English
A.
+1 V
B.
$-$1 V
C.
+2 V
D.
$-$2 V
2011 Q74 NEET MCQ
10 Mar 2026
A thermocouple of negligible resistance produces an e.m.f. of 40 µV/ºC in the linear range of temperature. A galvanometer of resistance 10 ohm whose sensitivity is 1 µA/division, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be
A.
1ºC
B.
0.5 ºC
C.
0.1ºC
D.
0.25ºC
2011 Q75 NEET MCQ
10 Mar 2026
A current of 2 A flows through a 2 $\Omega $ resistor when connected across a battery a 2 $\Omega $ resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 $\Omega $ resistor. The internal resistance of the battery is
A.
0.5 $\Omega $
B.
1/3 $\Omega $
C.
1/4 $\Omega $
D.
1 $\Omega $
2011 Q76 NEET MCQ
10 Mar 2026
If power dissipated in the 9 $\Omega $ resistor in the circuit shown is 36 watt, the potential difference across the 2 $\Omega $ resistor is

AIPMT 2011 Prelims Physics - Current Electricity Question 89 English
A.
4 volt
B.
8 volt
C.
10 volt
D.
2 volt
2010 Q77 NEET MCQ
10 Mar 2026
A potentiometer circuit is set up as shown. The potential gradient, across the potentiometer wire, is k volt/cm and the ammeter, present in the circuit, reads 1.0 A when two way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3, is plugged in, are found to be at length $l$1 cm and $l$2 cm respectively. The magnitudes, of the resistors R and X, in ohms, are then, equal, respectively, to

AIPMT 2010 Prelims Physics - Current Electricity Question 86 English
A.
$k({l_2} - {l_1})$ and $k{l_2}$
B.
$k{l_1}$ and $k({l_2} - {l_1})$
C.
$k\left( {{l_2} - {l_1}} \right)$ and $k{l_1}$
D.
$k{l_1}$ and $k{l_2}$
2010 Q78 NEET MCQ
10 Mar 2026
Consider the following two statements.
(A)  Kirchoff's junction law follows from the conservation of charge.
(B)  Kirchhoff's loop law follows from the conservation of energy.

Which of the following is correct?
A.
Both (A) and (B) are wrong
B.
(A) is correct and (B) is wrong
C.
(A) is wrong and (B) is correct
D.
Both (A) and (B) are correct
2009 Q79 NEET MCQ
10 Mar 2026
A wire of resistance 12 ohms per meter is bent to form a complete circle of radius 10 cm. The resistance between its two diametrically opposite points, A and B as shown in the figure is

AIPMT 2009 Physics - Current Electricity Question 84 English
A.
$3\,\Omega $
B.
$6\pi \,\Omega $
C.
$6\,\Omega $
D.
$0.6\pi \,\Omega $
2009 Q80 NEET MCQ
10 Mar 2026
The mean free path of electrons in a metal is 4 $ \times $ 10$-$8 m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units V/m
A.
$5 \times {10^{ - 11}}$
B.
8 $ \times $ 10$-$11
C.
5 $ \times $ 107
D.
8 $ \times $ 107
2009 Q81 NEET MCQ
10 Mar 2026
See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it ?

AIPMT 2009 Physics - Current Electricity Question 85 English
A.
${\varepsilon _2} - {i_2}{r_2} - {\varepsilon _1} - {i_1}{r_1} = 0$
B.
$ - {\varepsilon _2} - \left( {{i_1} + {i_2}} \right)R + {i_2}{r_2} = 0$
C.
${\varepsilon _1} - \left( {{i_1} + {i_2}} \right)R + {i_1}{r_1} = 0$
D.
${\varepsilon _1} - \left( {{i_1} + {i_2}} \right)R - {i_1}{r_1} = 0$
2009 Q82 NEET MCQ
10 Mar 2026
A student measures the terminal potential difference (V) of a cell (of emf $\varepsilon $ and internal resistance r) as a function of the current (I) flowing through it. The slope, and intercept, of the graph between V and I, then respectively, equal
A.
$-$ r and $\varepsilon $
B.
r and $-$ $\varepsilon $
C.
$-$ $\varepsilon $ and r
D.
$\varepsilon $ and $-$ r
2008 Q83 NEET MCQ
10 Mar 2026
AIPMT 2008 Physics - Current Electricity Question 81 English
In the circuit shown, the current through the 4 $\Omega $ resistor is 1 amp when the points P and M are connected to a d.c. voltage source. The potential difference betwen the points M and N is
A.
0.5 volt
B.
3.2 volt
C.
1.5 volt
D.
1.0 volt
2008 Q84 NEET MCQ
10 Mar 2026
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively
A.
both remain the same
B.
1.1 times, 1.1 times
C.
1.2 times, 1.1 times
D.
1.21 times, same
2008 Q85 NEET MCQ
10 Mar 2026
A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of 10 $\Omega $. Its internal resistance is
A.
2.0 ohm
B.
zero
C.
1.0 ohm
D.
0.5 ohm
2008 Q86 NEET MCQ
10 Mar 2026
A current of 3 amp. flows through the 2 $\Omega $ resistor shown in the circuit. The power dissipated in the 5 $\Omega $ resistor is

AIPMT 2008 Physics - Current Electricity Question 77 English
A.
1 watt
B.
5 watt
C.
4 watt
D.
2 watt
2008 Q87 NEET MCQ
10 Mar 2026
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20oC ? The temperature of boiling water is 100oC
A.
12.6 min
B.
4.2 min
C.
6.3 min
D.
8.4 min
2007 Q88 NEET MCQ
10 Mar 2026
The total power dissipated in watt in the circuit shown here is

AIPMT 2007 Physics - Current Electricity Question 75 English
A.
40
B.
54
C.
4
D.
16
2007 Q89 NEET MCQ
10 Mar 2026
Three resistances, P, Q, R each of 2$\Omega $ and an unknown resistance S from the four arms of a Wheatstone bridge circuit. When a resistance of 6 $\Omega $ is connected in parallel to S the bridge gets balanced. What is the value of S?
A.
3 $\Omega $
B.
6 $\Omega $
C.
1 $\Omega $
D.
2 $\Omega $.
2006 Q90 NEET MCQ
10 Mar 2026
Power dissipated across the 8 $\Omega $ resistor in the circuit shown here is 2 watt. The power dissipated in watt units across the 3 $\Omega $ resistor is

AIPMT 2006 Physics - Current Electricity Question 71 English
A.
3.0
B.
2.0
C.
1.0
D.
0.5
2006 Q91 NEET MCQ
10 Mar 2026
Kirchoff's first and second laws of electrical circuits are consequences of
A.
conservation of energy and electric charge respectively
B.
conservation of energy
C.
conservation of electric charhge and energy respectively
D.
conservation of electric charge.
2006 Q92 NEET MCQ
10 Mar 2026
Two cells, having the same e.m.f. are connected in series through an external resistance R. Cells have internal resistances r1 and r2 (r1 > r2) respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is
A.
r1 + r2
B.
r1 $-$ r2
C.
${{{r_1} + {r_2}} \over 2}$
D.
${{{r_1} - {r_2}} \over 2}$
2006 Q93 NEET MCQ
10 Mar 2026
In the circuit shown, if a conducting wire is connected between points A and B, the current in this wire will

AIPMT 2006 Physics - Current Electricity Question 74 English
A.
flow from B to A
B.
flow from A to B
C.
flow in the direction which will be decided by the value of V be zero.
D.
be zero
2005 Q94 NEET MCQ
10 Mar 2026
For the network shown in the figure the value of the current $i$ is

AIPMT 2005 Physics - Current Electricity Question 68 English
A.
${{9V} \over {35}}$
B.
${{18V} \over 5}$
C.
${{5V} \over 9}$
D.
${{5V} \over {18}}$
2005 Q95 NEET MCQ
10 Mar 2026
A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is
A.
0.04 ohm
B.
0.2 ohm
C.
5 ohm
D.
0.4 ohm
2005 Q96 NEET MCQ
10 Mar 2026
When a wire of uniform cross-section $a$ length $l$ and resistance R is bent into a complete circle. resistance between any two of diametrically opposite points will be
A.
R/4
B.
4R
C.
R/8
D.
R/2
2005 Q97 NEET MCQ
10 Mar 2026
Two batteries, one of emf 18 volts and internal resistance 2 $\Omega $ and the other of emf 12 volts and internal resistance 1 $\Omega $, are connected as shown. The voltmeter V will record a reading of

AIPMT 2005 Physics - Current Electricity Question 70 English
A.
30 volt
B.
18 volt
C.
15 volt
D.
14 volt
2004 Q98 NEET MCQ
10 Mar 2026
A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be
A.
2 volt
B.
3 volt
C.
1 volt
D.
1.5 volt
2004 Q99 NEET MCQ
10 Mar 2026
In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R, the resistance of a 60 W bulb for use in USA will be
A.
R
B.
2R
C.
R/4
D.
R/2
2004 Q100 NEET MCQ
10 Mar 2026
Five equal resistances each of resistances R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

AIPMT 2004 Physics - Current Electricity Question 64 English
A.
${{3V} \over R}$
B.
${V \over R}$
C.
${V \over {2R}}$
D.
${{2V} \over R}$