An ammeter and a voltmeter of resistance `R` connected in seires to an electric cell of negligible internal resistance. Their readings are `A` and `V` respecitvely. If another resistance `R` is connected in parallel with the voltmeter

Options

A. Both `A` and `V` will increase
B. Both `A` and `V` will decrease
C. `A` will decrease and `V` will increase
D. `A` will decrease and `V` will decrease

Answer

D

Explanation

(d) After connecting a resistance `R` in parallel with voltmeter, its effective resistance decreases. Hence, less voltage appears across it i.e., `V` will decrerases. Since overall resistance decreases so more current will flow i.e., `A` will increase.