Question

How many 1 micro F capacitors must be connected in parallel to store a charge of 1C with a potential of 110V across the capacitors

[DPMT 2011]

1) 990 2) 900 3) 9090 4) 909

Answer 1

How many 1 micro F capacitors must be connected in parallel to store a charge of 1C with a potential of 110V across the capacitors

[DPMT 2011]

1) 990

2) 900 ✔️✔️✔️

3) 9090

4) 909

Answer 2

Number of microfarad capacitors should be connected are -

3) 9090

Charge stored by 1microF capacitor is given by -

Q = C*V

Q = 1*10^-6*110

Q = 0.00011 C

0.00011 C is stored by 1 capacitor

1 C charge will be stored by - 1/0.00011

= 9090.9

Hence, number of capacitors which will store 1 C charge = 9090

•A capacitor is defined as "a passive two-terminal electrical component used to store energy electrostatically in an electric field."

•It contains insulating material called dielectric.

•Unit of capacitor is Farad.

•Farad is "when one coulomb of electricity changes the potential between the plates by one volt."