Electrostatics Test

Result

Electrostatics Test - 21

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Weekly Quiz Competition

Question 1
4 / -1

Work required to set up the four charge configuration (as shown in the figure) is

A
-0.21q²/ε₀ a

B
-1.29 q²/ε₀ a

C
-1.41 q²/ε₀ a

D
+2.82 q²/ε₀ a

Solution
Question 2
4 / -1

In the following diagram, the work done in moving a point charge from point P to point A, B and C is respectively as W_A , W_B and W_C , then

A
W_A = W_B = W_C

B
W_A = W_B = W_C = 0

C
W_A > W_B > W_C

D
W_A < W_B < W_C

Solution
Question 3
4 / -1

A positively charged ball hangs from a silk thread. We put a positive test charge q₀ at a point and measure F/q₀, then it can be predicted that the electric field strength E will be

A

B

C

D
None of these
Question 4
4 / -1

The positive terminal of 12 V battery is connected to the ground. Then the negative terminal will be at

A
– 6 V

B
+ 12 V

C
zero

D
– 12 V
Question 5
4 / -1

A charge (–q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (–q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done in moving the charge (–q) is

A

B

C

D
Zero

Solution
Question 6
4 / -1

A long string with a charge of λ per unit length passes through an imaginary cube of edge a. The maximum flux of the electric field through the cube will be

A

B

C

D

Solution
Question 7
4 / -1

The capacitance of the capacitor of plate areas A₁ and A₂ (A₁ < A₂) at a distanced d, Fig. is

A

B

C

D

Solution
Question 8
4 / -1

In the circuit shown in Fig., C = 6 µF. The charge stored in capacitor of capacity C is

A
90 µC

B
40µC

C
60µC

D
Zero

Solution
Question 9
4 / -1

A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 V. The potential at the centre of the sphere is

A
zero

B
80 V

C
800 V

D
8 V
Question 10
4 / -1

Two capacitors A and B are connected in series with a battery as shown in Fig. When the switch S is closed and the two capacitors get charged fully, then

A
The potential difference across the plates of A is 4 V and across the plates of B is 6 V

B
The potential difference across the plates of A is 6 V and across the plates of B is 4 V

C
The ratio of electrical energies stored in A and B is 2 : 3

D
The ratio of charges on A and B is 3 : 2

Solution