Question

If the charge on the condenser of 10°F is doubled, then the energy stored in it becomes __________

Options

• zero

• twice that of initial energy

• half the initial energy

• four times the initial energy

Answer 1

If the charge on the condenser of 10°F is doubled, then the energy stored in it becomes four times the initial energy.

`"E" = q^2/(2c)`

`E' = (2q)^2/(2c) = 4(q^2/(2c))`

`E' = 4E`