Question

13.When a high resistance voltmeter is connected directly across a resister its reading is 2 V. An electric cell is sending the current of 0.4 A, (measured by an ammeter) in the electric circuit in which a rheostat is also connected to vary the current. (a) Draw an equivalent labelled circuit for the given data. (b) Find the resistance of the resister. (c) Name and state the law applicable in the given case. A graph is drawn between a set of values of potential difference (V) across the resister and current (I) flowing through it. Show the nature of graph thus obtained.

Answer 1

Explanation:

When a high resistance voltmeter is connected directly across a resistor,its reading is 2v . An electric cell is sending the current of 0.4A in the electric circuit in which a rheostat is also connected to vary the current.