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The resistance if a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be:

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The resistance if a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be:

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An inductor of inductance L= 400mH and resistors R1=2Ω and R2=2Ω are connected to a battery of emf 12V . The internal resistance of the battery is negligible. The switch S is closed at t=0. The potential drop across L as a function of time is:

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An inductor of inductance L= 400mH and resistors R1=2Ω and R2=2Ω are connected to a battery of emf 12V . The internal resistance of the battery is negligible. The switch S is closed at t=0. The potential drop across L as a function of time is:

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A moving coil galvanometer of resistance 100 Ω is used as an ammeter using a resistance 0.1 Ω. The maximum deflection current in the galvanometer is 100 μA. Find the minimum current in the circuit so that ammeter shows maximum deflection.

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A moving coil galvanometer of resistance 100 Ω is used as an ammeter using a resistance 0.1 Ω. The maximum deflection current in the galvanometer is 100 μA. Find the minimum current in the circuit so that ammeter shows maximum deflection.

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When a conservative force does positive work on a body A. The potential energy increases B. The potential energy decreases C. Total energy increases D. Total energy decreases

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When a conservative force does positive work on a body A. The potential energy increases B. The potential energy decreases C. Total energy increases D. Total energy decreases

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A bomb is dropped from an aeroplane when it is directly above a target at a height of 1000 m. The aeroplane is moving horizontally with a speed of 500km/h. By how much distance will the bomb miss the target?

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A bomb is dropped from an aeroplane when it is directly above a target at a height of 1000 m. The aeroplane is moving horizontally with a speed of 500km/h. By how much distance will the bomb miss the target?

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