Question

In given figure an ammeter reads 5 A and voltmeter reads 40 V. The actual value of resistance R is

A. `8 Omega`
B. greater than `8 Omega`
C. less than `8 Omega`
D. `200 Omega`

Answer 1

Correct Answer - B
Combind resistance of R and voltmeter.
`=(40)/(5)=8 Omega rArr (1)/(8)=(1)/( R) +(1)/(R_v)`
`rArr R gt 8 Omega`.