Three voltmeters are connected as shown.

A potential difference has been applied between `A` and `B`. On closing the swich `S`, readings of voltmeters?

Options

A. `V_(1)` increases
B. `V_(1)` decreases
C. `V_(2)` and `V_(3)` both increases
D. One of `V_(2)` and V_(3)` increases and other decreases.

Answer

C

Explanation

Initially, when swich is open, `V_(2)` and `V_(3)` will be out of circuit
or they are short-circuied. So no potential difference is across
V_(2)` and `V_(3)`. On closing the swich, all three voltmeters will be on parallel. Now, three is same potential difference across `V_(2)` and `V_(3)`. So potential difference across `V_(2)` and `V_(3)` increases and potential difference across `V_(1)` remains the same.