WBJEE PYQs for Electric Charges and Fields with Solutions: Practice WBJEE Previous Year Questions

Updated on - Dec 31, 2025

Electric Charges and Fields is an important topic in the Physics section in WBJEE exam. Practising this topic will increase your score overall and make your conceptual grip on WBJEE exam stronger.

This article gives you a full set of WBJEE PYQs for Electric Charges and Fields with explanations for effective preparation. Practice of WBJEE Physics PYQs including Electric Charges and Fields questions regularly will improve accuracy, speed, and confidence in the WBJEE 2026 exam.

WBJEE PYQs for Electric Charges and Fields with Solutions

1.
Number of particles passing in unit time through unit area perpendicular to the z-axis is given by:
$N = D \dfrac{(N_2 - N_1)}{(Z_2 - Z_1)}$,
where $N_2$ and $N_1$ are the number of particles in unit volume at $Z_2$ and $Z_1$. The dimensional formula of $D$ is?
- (A) M⁰L^-2T²
- (B) M⁰L^-1T^-1
- (C) M⁰L²T^-1
- (D) M⁰L^-2T^-2
View Solution
2.
An infinite sheet carrying a uniform surface charge density o lies on the $x y$-plane. The work done to carry a charge $q$ from the point $A =a(\hat{ i }+2 \hat{ j }+3 \hat{ k })$ to the point $B =a(\hat{ i }-2 \hat{ j }+6 \hat{ k })$ (where $a$ is a constant with the dimension of length and $\varepsilon_{0}$ is the permittivity of free space) is
- $\frac{3\sigma aq}{2\varepsilon_{0}}$
- $\frac{2\sigma aq}{\varepsilon_{0}}$
- $\frac{5\sigma aq}{2\varepsilon_{0}}$
- $\frac{3\sigma aq}{\varepsilon_{0}}$
View Solution
3.
A positive charge $Q$ is situated at the centre of a cube. The electric flux through any face of the cube is (in $SI$ units)
- $\frac{Q}{6\varepsilon_{0}}$
- $4\pi Q$
- $\frac{Q}{4\pi\varepsilon_{0}}$
- $\frac{Q}{6\pi\varepsilon_{0}}$
View Solution
4.
Four charges equal to $-Q$ are placed at the four corners of a square and a charge $q$ is at its centre. lf the system is in equilibrium, the value of $q$ is
- $ \frac{ - Q}{ 4} \, ( 1+ 2 \sqrt 2)$
- $ \frac{ Q}{ 4} \, ( 1+ 2 \sqrt 2)$
- $ \frac{ - Q}{ 2} \, ( 1+ 2 \sqrt 2)$
- $ \frac{ Q}{ 2} \, ( 1+ 2 \sqrt 2)$
View Solution

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WBJEE PYQs for Electric Charges and Fields with Solutions

1.Number of particles passing in unit time through unit area perpendicular to the z-axis is given by: $N = D \dfrac{(N_2 - N_1)}{(Z_2 - Z_1)}$, where $N_2$ and $N_1$ are the number of particles in unit volume at $Z_2$ and $Z_1$. The dimensional formula of $D$ is?

3.A positive charge $Q$ is situated at the centre of a cube. The electric flux through any face of the cube is (in $SI$ units)

4.Four charges equal to $-Q$ are placed at the four corners of a square and a charge $q$ is at its centre. lf the system is in equilibrium, the value of $q$ is

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1.
Number of particles passing in unit time through unit area perpendicular to the z-axis is given by:
$N = D \dfrac{(N_2 - N_1)}{(Z_2 - Z_1)}$,
where $N_2$ and $N_1$ are the number of particles in unit volume at $Z_2$ and $Z_1$. The dimensional formula of $D$ is?

3.
A positive charge $Q$ is situated at the centre of a cube. The electric flux through any face of the cube is (in $SI$ units)

4.
Four charges equal to $-Q$ are placed at the four corners of a square and a charge $q$ is at its centre. lf the system is in equilibrium, the value of $q$ is