Electric Field And Potential MCQ Level - 2

# Electric Field And Potential MCQ Level - 2 - Physics

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## 10 Questions MCQ Test Topic wise Tests for IIT JAM Physics - Electric Field And Potential MCQ Level - 2

Electric Field And Potential MCQ Level - 2 for Physics 2023 is part of Topic wise Tests for IIT JAM Physics preparation. The Electric Field And Potential MCQ Level - 2 questions and answers have been prepared according to the Physics exam syllabus.The Electric Field And Potential MCQ Level - 2 MCQs are made for Physics 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Electric Field And Potential MCQ Level - 2 below.
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Electric Field And Potential MCQ Level - 2 - Question 1

### Two point charges placed at a distance r in air experience a certain force. Then the distance at which they will experience the same force in a medium of dielectric constant k is

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 1 The correct answer is: Electric Field And Potential MCQ Level - 2 - Question 2

### Two isolated, charged conducting spheres of radii a and b produce the same electric field near their surfaces. The ratio of electric potentials on their surfaces is

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 2 Electric Field And Potential MCQ Level - 2 - Question 3

### Twenty seven drops of water of the same size are equally and similarly charged. They are then united  to from a bigger drop. By what factor will the electrical potential changes.

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 3 The correct answer is: 9 times

Electric Field And Potential MCQ Level - 2 - Question 4

Electric potential at any point x, y, z in the space is given V=4x2−3x. Find electric field

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 4

V = 4x2 - 3x
Ex = ∂V/∂x = 8x - 3
Ey = ∂V/∂y = 0
Ez = ∂V/∂z = 0
So, E = -(8x - 3)

Electric Field And Potential MCQ Level - 2 - Question 5

An electric dipole consisting of two opposite charge of 2 × 10–6C each separated by a distance of 0.03m is placed in an electric field of 2 × 105NC–1. The maximum torque on the dipole will be

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 5

q = 2 × 10–6 C
2l = 0.03 m
E = 2 × 10
5 NC–1
τ = ρE sin θ Where p is the dipole moment.

For maximum torque,  sinθ = 1  and    τ = ρE
Max. Torque = q × 2l × E = 2 × 10–6 × 0.03 × 2 × 105 Nm
=
12 × 10–3 Nm
The correct answer is: 12 × 10–3Nm.

Electric Field And Potential MCQ Level - 2 - Question 6

Two identical point charge are placed at a separation of rP is a point on the line joining the charges, at a distance x from any one charge. The field at P is EE is plotted against x, for value of x from close to zero to slightly less than r. Which of the following best represent the resulting curve.

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 6 Electric Field And Potential MCQ Level - 2 - Question 7

A spherical charged conductor has surface density σ of charge. The electric field on its surface is E. If the radius of the sphere is doubled keeping the surface density of charged unchanged then the electric field on the surface of the new sphere will be

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 7

E = KQ/R2
= Kσ(4πR2)/R2
= σ/ε0
R ----> 2R and σ = unchanged
E' = Kσ[4π(2R)2]/(2R)2
=> σ/ε0 = E

Electric Field And Potential MCQ Level - 2 - Question 8

A charge q is divided into two parts q1 and (q – q1). What is the ratio so that the force between two parts placed at a given distance apart is maximum.

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 8

F = k(q1)(q – q1)
F will be maximum. If q1(q – q1) is maximum
∴   q= (q – q1)
⇒ q = 2q1
⇒  q/q1 = 2:1
The correct answer is: 2 : 1

Electric Field And Potential MCQ Level - 2 - Question 9

Two concentric thin metallic sphere of radii R1 and (R1 > R2) carry charge Q1 and Q2 respectively. The potential at point P (distance from common centre is r) is (k=1/4πϵ0​1)

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 9

The observation point is at a distance r from the centre of the inner sphere of radius R2. But it is inside the sphere of radius R1.

The correct answer is: Electric Field And Potential MCQ Level - 2 - Question 10

Two equal negative charge (q each) are fixed at point (0, a) and (0, –a) on the y-axis. A positive charge Q is released from rest at the points (29, 0) on the x-axis is the charge Q will

Detailed Solution for Electric Field And Potential MCQ Level - 2 - Question 10  ## Topic wise Tests for IIT JAM Physics

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