Electrostatics Test

Result

Electrostatics Test - 69

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Weekly Quiz Competition

Question 1
4 / -1

Choose the incorrect statement from the following When two identical capacitors are charged individually to different potentials and connected parallel to each other after disconnecting them from the source

A
Net charge equals the sum of initial charges

B
The net energy stored in the two capacitors is less than the sum of the initial individual energies

C
The net potential difference across them is difference from the sum of the individual initial potential difference

D
The net potential difference across them equals the sum of the individual initial potential differences
Question 2
4 / -1

The charge on a capacitor of capacitance 10 µF connected as shown in the figure is

A
20 µC

B
15 µC

C
10 µC

D
Zero

Solution
Question 3
4 / -1

The resultant capacitance of given circuit is

A
3 C

B
2 C

C
C

D
c/3

Solution
Question 4
4 / -1

Three plates A, B, C each of area 50 cm² have separation 3 mm between A and B and 3 mm between B and C. The energy stored when the plates are fully charge is

A
1.6 × 10^–9 J

B
2.1 × 10^–9 J

C
5 × 10^–9 J

D
7 × 10^–9 J

Solution
Question 5
4 / -1

A capacitor of 20 µF is charged to 500 volts and connected in parallel with another capacitor of 10 µF and charged to 200 volts. The common potential is

A
200 volts

B
300 volts

C
400 volts

D
500 volts

Solution
Question 6
4 / -1

What is the effective capacitance between A and B in the following figure?

A
1 µF

B
2 µF

C
1.5 µF

D
2.5 µF

Solution
Question 7
4 / -1

Ten capacitor are joined in parallel and charged with a battery up to a potential V. They are then disconnected from battery and joined again in series then the potential of this combination will be

A
V

B
10V

C
5V

D
2V

Solution
Question 8
4 / -1

In the circuit here, the steady state voltage across capacitor C is a fraction of the battery e.m.f. The fraction is decided by

A
R₁ only

B
R₁ and R₂ only

C
R₁ and R₃ only

D
R₁, R₂ and R₃

Solution
Question 9
4 / -1

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

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

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

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

D
The ration of charges A and B is 3 : 2

Solution
Question 10
4 / -1

Equivalent capacitance between A and B is

A
8 µF

B
6 µF

C
26 µF

D
10/3 µF

Solution