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The figure shows the connections of a ...

The figure shows
the connections of a rheostat with an external battery. A is an ammeter and V is a voltmeter. The sliding contact R starts from point P and moves towards the end Q. The correct statement is

A

Both ammeter and voltmeter show constant reading

B

The reading of ammeter remains constant but that of voltmeter increases

C

The reading of ammeter remains constant but that of voltmeter decreases

D

Both ammeter and voltmeter reading increases.

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