Electric Current Test

Result

Electric Current Test - 6

Score
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Rank
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TIME Taken - -

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Question 1
1 / -0

The potential difference across the terminals of a battery is 50 V when 11 A current is drawn and 60 V when 1 A current is drawn. The emf and the internal resistance of the battery are

A
62 V, 2 Ω

B
63 V, 1 Ω

C
61 V, 1 Ω

D
64 V, 2 Ω

Solution

For a closed circuit, cell supplies a constant current in the circuit.

Equation of cell E=V+l,

For V= 50V

E=50+11r

Similarly, for V=60V

E=60+r

from Eqs. (i)and (ii), we get E=61V
Question 2
1 / -0

In CuSO₄ solution when electric current equal to 2.5 faradays is passed, the gm equivalent deposited on the cathode is

A
1

B
1.25

C
2

D
2.5

Solution

On passing 2 faradays, 1 g equivalent is deposited. Hence, on passing 2.5 faradays, the deposited equivalent will be equal to 1.25 g equivalent.