iCON Education - Electrostatics AIIMS Test

Question 1: Palette 1/5

AIIMS 2018 MCQ

A half ring of radius $R$ has a charge of $\lambda$ per unit length. The electric force on $1 \mathrm{C}$ charged placed at the centre is

zero

$\frac{k \lambda}{R}$

$\frac{2 k \lambda}{R}$

$\frac{k \pi \lambda}{R}$

Question 2: Palette 2/5

AIIMS 2018 MCQ

Positive charge $Q$ is distributed uniformly over a circular ring of radius $R$. A point particle having a mass $(m)$ and a negative charge $-q$ is placed on its axis at a distance $x$ from the centre. Assuming $x < R$, find the time period of oscillation of the particle, if it is released from there [neglect gravity].

$\left[\frac{16 \pi^3 \varepsilon_0 R^3 m}{Q q}\right]^{1 / 2}$

$\left[\frac{8 \pi^2 \varepsilon_0 R^3}{q}\right]^{1 / 2}$

$\left[\frac{2 \pi^3 \varepsilon_0 R^3}{3 q}\right]^{1 / 2}$

None of these

Question 3: Palette 3/5

AIIMS 2018 MCQ

Assertion Mass of a body decreases slightly when it is negatively charged.

Reason Charging is due to transfer of electrons.

Both Assertion and Reason are correct, Reason is the correct explanation of Assertion

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

Assertion is correct and Reason is incorrect

Assertion is incorrect and Reason is correct

Question 4: Palette 4/5

AIIMS 2017 MCQ

Charges $+q$ and $-q$ are placed at points $A$ and $B$ respectively which are a distance $2 L$ apart, $C$ is the mid-point between $A$ and $B$. The work done in moving a charge $+Q$ along the semicircle $C R D$ is

AIIMS 2017 Physics - Electrostatics Question 2 English

$\frac{q Q}{4 \pi \varepsilon_0 L}$

$\frac{q Q}{2 \pi \varepsilon_0 L}$

$\frac{q Q}{6 \pi \varepsilon_0 L}$

$\frac{-q Q}{6 \pi \varepsilon_0 L}$

Question 5: Palette 5/5

AIIMS 2017 MCQ

Assertion : The electric field due to a dipole on its axis line at a distance $r$ is $E$. Then, electric field due to the same dipole on the equatorial line and at the same distance will be $E / 2$.

Reason : Electric field due to dipole varies inversely as the square of the distance.

Both assertion and reason are true and reason is the correct explanation of assertion

Both assertion and reason are true but reason is not the correct explanation of assertion

Assertion is true but reason is false

Both assertion and reason are false.