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A circuit is shown in the figure. The ra...

A circuit is shown in the figure. The ratio of readings of ideal voltmeter to reading of ideal ammeter is

A

5

B

0.5

C

10

D

2.5

Text Solution

Verified by Experts

The correct Answer is:
C
Use V=IR and voltage divider formula
Reading of voltmeter
`V=(10)/(10+(20xx20)/(20+20))xx10=5V`
Reading of ammeter A is `i=10/20=0.5A`
Ratio of V and I, `V/I = (5)/(0.5) = 10`
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