Question

If the ideal ammeter reads 4 A, the reading of ideal voltmeter will be:
Options
15V
12V
10V
3V​

Answer 1

Answer:

Current in 5ohm resistance will be

= (15/5+3+12)x4

=(15/20) x4

=3 A

Now current in 3 and 12 ohm branch will be

4-3 A

= 1A

Voltage drop in 12ohm resistance

V=ir

V =1 x 12

= 12 volt