Consider two electric bulbs rated for the same voltage having powers of 100W and 200W. If R1 and R2 be their resistances respectively, then: Which among the following relations is... Consider two electric bulbs rated for the same voltage having powers of 100W and 200W. If R1 and R2 be their resistances respectively, then: Which among the following relations is incorrect? When a load is switched off, sparking occurs because of high .......... of the circuit. For what purpose are voltage dependent resistors used? At a temperature of 0K, germanium behaves as a/an: What will be the voltage drop across a 1 kW electric heater whose resistance, when hot, is 40Ω?
Understand the Problem
The questions cover topics related to electric bulbs, power and resistance relations, circuit characteristics, and the behavior of materials at low temperatures. Each question presents a specific inquiry into electrical concepts and requires a clear understanding of electrical principles.
Answer
The incorrect relation is P = V/R².
The incorrect relation is (b) P = V/R².
Answer for screen readers
The incorrect relation is (b) P = V/R².
More Information
The power formula for resistance in circuits is P = V²/R, not P = V/R², which is why option (b) is incorrect.
Tips
Confusing power formulas can lead to wrong calculations. Remember P = V²/R for resistive circuits.
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