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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
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
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A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
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You are provided with three resistors of resistance 1.0 Ω, 2.0 Ω and 3.0 Ω How would you connect them to obtain the total effective resistance 1.5 Ω? Draw diagram of the arrangement and check it by calculations.
The resistance of two resistors joined in series is 8Ω and in parallel is 1.5Ω. Find the value of the two resistances.
