Assertion: For practical purposes, the earth is used as a reference at zero potential in electrical circuits.

Question

Assertion: For practical purposes, the earth is used as a reference at zero potential in electrical circuits.

and

Reason: The earth can be considered to be sphere of extremely large radius so for any finite value of charge its potential remain unchanged and hence can be used as reference.

Smart Achievers · Accepted Answer

(1)

For any value of finite value of charge, $\frac{k Q}{R} \to 0$ as radius R is very large

Solution

Q.
Assertion: For practical purposes, the earth is used as a reference at zero potential in electrical circuits.

and

Reason: The earth can be considered to be sphere of extremely large radius so for any finite value of charge its potential remain unchanged and hence can be used as reference.

1 Assertion and Reason are True; Reason is a correct explanation for Assertion

2 Assertion and Reason are True; Reason is not a correct explanation for Assertion

3 Assertion is True, Reason is False

4 Assertion is False, Reason is True

Ans.
(1)

For any value of finite value of charge, $\frac{k Q}{R} \to 0$ as radius R is very large

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