Why the charge on a capacitor always equal to charge on it's positive plate and not on the negative one?

Open in App

Solution

Becoz current always flow from -ve to +ve. Hence, charge will flow towards +ve plate and flow away from -ve plate. So, the charge on a capacitor is always equal to charge on it's positive plate and not on the negative one

Suggest Corrections

Similar questions

Q. Suppose a charge +Q₁ is given to the positive plate and a charge −Q₂ to the negative plate of a capacitor. What is the "charge on the capacitor"?

Q. Assertion :Each of the plates of a parallel-plate capacitor is given equal positive charge

Q

. The charges on the facing surfaces will be same. Reason: A negative charge

(- Q)

will be induced on each of the facing surfaces.

A charge of $+ 2.0 \times 10^{- 8} C$ is placed on the positive plate and a charge of $- 1.0 \times 10^{- 8} C$ on the negative plate of a parallel-plate capacitor of capacitance $1.2 \times 10^{- 3} μ F .$

Calculate the potential difference developed between the plates.

Q. Assertion: Charges are given to plates of two plane parallel plate capacitors

C_{1}

and

C_{2}

(such that

C_{2} = 2 C_{1}

)as shown in figure. Then the key

K

is pressed to complete the circuit. Finally the net charge on upper plate and net charge the circuit. Finally the net charge on upper plate and net charge on lower plate of capacitor

C

is positive.
Reason : In a parallel plate capacitor both plates always carry equal and opposite charge.

Q. Two parallel plate capacitors A and B having capacitances of

1 μ F

and

5 μ F

are charged separately to the same potential of

100

V. Now the positive plate of A is connected to the negative plate of B and the negative plate of A to the positive plate of B. The final charge on each capacitor is?

Join BYJU'S Learning Program