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प्रश्न
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
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उत्तर
The resistance of the rheostat will not change at all as it does not depend on the voltage applied across it.
संबंधित प्रश्न
How does the presence of impurities in a metal affect its resistance?
Give one example to show how the resistance depends on the nature of material of the conductor.
How does the resistance of a wire change when:
its length is tripled?
State the effect of rise in temperature on the resistance of semi-conductors.
How does the resistivity of an alloy such as constantace depends on temperature.
State expression for Resistance connected in parallel.
State and explain the laws of resistance.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
