Electrostatics Test

Result

Electrostatics Test - 28

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Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

A sphere of radius 1 m encloses a charge of 5µC. Another charge of –5µC is placed inside the sphere. The net electric flux would be

A
double

B
four times

C
zero

D
none of the above

Solution
Question 3
4 / -1

Three capacitors are connected to a d.c source of 100 V as shown in Fig. If the charge accumulated on the plates of C₁, C₂ and C₃ are q_a,q_b, q_c, q_d, q_e and q_f respectively, then

A

B

C

D
Question 4
4 / -1

In the combination of capacitors shown in Fig., the potential difference across the plates of the capacitor A will be

A
4.8 V

B
6 V

C
1.2 V

D
2.4 V

Solution
Question 5
4 / -1

A capacitor C₁ of capacitance 1 µF and capacitor C₂ of 2µF are separately charged fully by a common battery. The two capacitors are then allowed to discharge through equal resistors. Then

A
The current in each of two discharging circuits is zero at t = 0

B
The currents in the two discharging circuits at t = 0 are equal but not zero

C
The currents in the two discharging circuits at t = 0 are unequal

D
Capacitor C₁ loses 50% of its initial charge sooner than C₂ loses 50% of its initial charge

Solution
Question 6
4 / -1

A thin metal plate M is inserted between the plates of a parallel plate capacitor as shown in Fig. The new capacitance in terms of initial capacitance C is

A
2C

B
C/2

C
C

D
infinity

Solution
Question 7
4 / -1

A capacitor of capacity C₁ =1µF is charged to a potential of 100 V. The charging battery is then removed and it is connected to another capacitor of capacity C₂ = 2µF. One plate of C₂ is earthed as shown in Fig. The charges on C₁ and C₂ in steady state will

A

B
50μC, 50μC

C
Zero, zero

D
100μC, zero

Solution
Question 8
4 / -1

A 10 µF capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt. The capacitance of second capacitor is

A
15 µF

B
30 µF

C
20 µF

D
10 µF

Solution
Question 9
4 / -1

In the given circuit with steady current, the potential drop across the capacitor must be

A
V

B
V/2

C
V/3

D
2V/3

Solution
Question 10
4 / -1

Consider the situation shown in Fig. The capacitor A has a charge q on it whereas B is uncharged. The charge appearing on the capacitor B a long time after the switch is closed is

A
Zero

B
q/2

C
q

D
2q