Question

What is the value of capacitance of a capacitor if it has a charge of 9C and voltage of 5V?

(a) 1.8F

(b) 45F

(c) 4.5F

(d) 8.1F

I have been asked this question in an international level competition.

My enquiry is from Capacitors and Capacitance topic in chapter Electrostatic Potential and Capacitance of Physics – Class 12

Answer 1

The correct answer is (a) 1.8F

To explain I would say: Since we know that capacitance=\(\frac {charge}{voltage}\).

Therefore capacitance=\(\frac {9}{5}\)=1.8F.