Question

The voltage between two points in a circuit is 4.2 V. If the resistance between

the points is 72, what is the current, according to Ohm's law?
A. 0.058 A
B. 76.2 A
O C. 17.1 A
O D. 302 A

Answer 1

A. 0.058 A

Step-by-step explanation:

Answer 2

I = 0.058 [A]

Step-by-step explanation:

Ohm's law is defined as voltage equal to the product of current by resistance.

`V =I*R`

where:

V = voltage = 4.2 [V]

I = current [amp]

R = resistivity = 72 [ohm]

Now clearing I, we have:

`I = V/R\\I = 4.2/72\\I = 0.058 [A]`