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Q.

When connected across the terminals of a cell, a voltmeter measures 5 V and a connected ammeter measures 10 A of current. A resistance of 2 ohms is connected across the terminals of the cell. The current flowing through this resistance will be

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a

2.5 A

b

2.0 A

c

5.0 A

d

7.5 A

answer is B.

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Detailed Solution

Emf E = 5 V , Internal resistance

r = \frac{5}{{10}} = 0.5\Omega

Current through the resistance

i = \frac{5}{{(2 + 0.5)}} = 2A
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