Question

In the circuit shown in figure ammeter and voltmeter are ideal. If `E=4 V,R=9Omega` and `r=1Omega` then readings of ammeter and voltmeter are

A. `1A, 3V`
B. `2A,3V`
C. `3A,4V`
D. `4A,4V`

Answer 1

Correct Answer - A
All these resistors are in paralllel.
`:. R_("net")=R/3+r=4Omega`
Hence, the main current
`i=E/R_("net")=1A`
Current through either of the resistance
`is i/3=or 1/3A`
`:. V=iR=(1/3)(9)=3V`