In potentiometer experiment, the potential gradient can be increased byA. increasing the cross-sectional area of the potentiometer wire.B. using a wire of material of low specific resistance.C. decreasing the cross-sectional area of the potentiometer wire.D. decreasing the current through it.

In potentiometer experiment, the potential gradient can be increased by
A. increasing the cross-sectional area of the potentiometer wire.
B. using a wire of material of low specific resistance.
C. decreasing the cross-sectional area of the potentiometer wire.
D. decreasing the current through it.

Physics

In potentiometer experiment, the potential gradient can be increased by
A. increasing the cross-sectional area of the potentiometer wire.
B. using a wire of material of low specific resistance.
C. decreasing the cross-sectional area of the potentiometer wire.
D. decreasing the current through it.

Correct answer is C.

i

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More Material

Two cells of voltage 10V and 2V and internal resistances 10Ω and 5Ω respectively are connected in parallel with the positive end of the 10V battery connected to the negative pole of 2V battery. Find the effective voltage and effective resistance of the combination.

Suppose there is a circuit consisting of only resistances and batteries and we have to double all voltages and all resistances. Show that currents are unaltered.

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Power P is to be delivered to a device via transmission cables having resistance Rc. If V is the voltage across R and I the current through it, find the power wasted and how can it be reduced.

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