A portable music player, operating with four 1.5 V cells connected in series, provides a resistance of 15 000 Ω. What amount of current is flowing through the music player?

Given that,

A portable music player is operating with 4 cell batteries connected in series, and each cell has a P. D of 1.5V.

Then,

Total potential difference is

P. D_total = V1 + V2 + V3 + V4

P. D_total = 1.5 + 1.5 + 1.5 + 1.4

P. D_total = 6V.

The music player provides a resistance of 15,000Ω

R = 15,000Ω

We want to find the current (I) flowing through the music player?

Using ohms law

V = IR

Where

V is the potential difference

I is the current

R is the resistance

Therefore,

I = V/R

I = 6 / 15,000

I = 4 * 10^-4 A

I = 0.4 * 10^-3 A

I = 0.4 mA.

So, 0.4mA is passing through the music player