Question

if the PD of 12 V is applied across a 3 ohms resistor then the current passing through it is ______

Answer 1

Answer:

Well you just need to know Ohms law to find an easy answer to such questions.

V = IR, I = V/R and R = V/I. Where I is amperes.

So you have the volts (12) and the resistance (3) and you want current. So use

I =V/R. 12/3 - 4 amps.

Explanation:

V=IR

I=

R

V

=

3

12

=4 A