Four copper wires of equal length are connected in series. Their cross-sectional areas are 0.7 cm2 , 2.5 cm2 , 2.2 cm2 , and 3 cm2 . If a voltage of 145 V is applied to the arrangement, determine the voltage across the 2.5 cm2 wire.

22.1 V

Explanation:

We are given that

Using

We know that

In series

Substitute the values

Voltage across the 2.5 square cm wire=

Voltage across the 2.5 square cm wire=

Voltage across the 2.5 square cm wire=22.1 V

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.