The length of potentiometer wire is I. A cell of e.m.f. E is balanced

1.	The length of potentiometer wire is I. A cell of e.m.f. E is balanced at the length 113 from the positive end of the wire. If the length of the wire is increased by 1/2, at what distance will the same cell give a balance point. (a) I/2(c) I/3(c) I/4(d) I/5
Answer» Correct option(a) Explanation: Let e.m.f of cell is proportional to ‘I₁’ when length of wire is I, balance point obtain at I/3 length. i.e., I₁ = I/3. If length of wire varies, balance point will obtain at length one third of total length of wire of potentiometer. Now total length of wire = 3I/2 Balance point obtained at = 1/2

The length of potentiometer wire is I. A cell of e.m.f. E is balanced at the length 113 from the positive end of the wire. If the length of the wire is increased by 1/2, at what distance will the same cell give a balance point. (a) I/2(c) I/3(c) I/4(d) I/5

Answer»

Correct option(a)

Explanation:

Let e.m.f of cell is proportional to ‘I₁’ when length of wire is I, balance point obtain at I/3 length. i.e., I₁ = I/3.

If length of wire varies, balance point will obtain at length one third of total length of wire of potentiometer.

Now total length of wire = 3I/2

Balance point obtained at = 1/2

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The length of potentiometer wire is I. A cell of e.m.f. E is balanced at the length 113 from the positive end of the wire. If the length of the wire is increased by 1/2, at what distance will the same cell give a balance point. (a) I/2(c) I/3(c) I/4(d) I/5

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