The strength of the current flowing through the filament of an electric flashlight lamp is 0.2 A.

The strength of the current flowing through the filament of an electric flashlight lamp is 0.2 A. How long does it take for an electric charge of 1 C to pass through the filament of the lamp?

Initial data: I (current on the filament of an electric flashlight lamp) = 0.2 A; q (the charge that passed through the lamp filament in time t) = 1 C.

The required time value is calculated using the following formula:

I = q / t, whence t = q / I.

Let’s do the calculation:

t = 1 / 0.2 = 5 s.

Answer: A charge of 1 C will pass through the lamp filament in 5 seconds.