Question

The ammeter below shows the current produced by a series of solar cells that contain zinc plates being used to power a simple series circuit.
If the circuit’s resistance is 0.2 Ω, what voltage is supplied by the cells?


A) 750 v

B) 15 v

C) 3 v

D) 25 v

Answer 1

The Ammeter shows:  I = 15 A,
The circuit resistance is R = 0.2  Ohms.
By the Ohm`s Law:
R = V / I or:
V = I · R
V = 15 A · 0.2 Ohms
V = 3 V
Answer: C ) 3 V.