The material of wire of potentiometer is...

The material of wire of potentiometer is

copper

steel

manganese

aluminium

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A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-metre and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)" m"^(2) . The potential gradient along the potentiometer wire is

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A potentiometer wire of length 10 m is connected in series with a battery the emf of a cell balances against 250 cm length of wire if length of potentiometer wire is increased by 1 m then new balancing length of wire will be

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A 2 volt battery, a 15 Omega resistor and a potentiometer of 100 cm length, all are connected in series. If the resistance resistance of potentiometer wire is 5 Omega , then the potential gradient of the potentiometer wire is

A potentiometer wire of Length L and a resistance r are connected in series with a battery of e.m.f. E_(0) and a resistance r_(1) . An unknown e.m.f. E is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by :

The material of wire has specific gravity 8. It is not wetted by water, what is the maximum diameter of the wire that will float on the surfacve of water?

In an experiment with a potentiometer V_B=10 V , R is adjusted to be 50 Omega as shown in figure. A student wanting to measure voltage E_1 of a battery (approx. 8 V) finds no null point possible. He then diminishes R to 10 Omega and is able to locate the null point on the last (4th) segment of potentiometer.Find the resistance of the potentiometer wire and potential drop per unit length across the wire in the second case.

CHETANA PUBLICATION-Current Electricity-Exercise

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The material of wire of potentiometer is
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State the principle of potentiometer.
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