GUJCET · Physics

Current Electricity

Drift velocity, Ohm's law, resistivity, temperature dependence, Kirchhoff's laws, Wheatstone bridge, potentiometer, internal resistance.

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  • Q1 · Current Electricity · EASY

    A wire of resistance 10 Ω is stretched to double its length. What is its new resistance, assuming the volume remains constant?

  • Q2 · Current Electricity · MEDIUM

    Three resistors of 2 Ω, 3 Ω and 6 Ω are connected in parallel. What is the equivalent resistance of the combination?

  • Q3 · Current Electricity · HARD

    A potentiometer wire of length 100 cm has a resistance of 10 Ω. It is connected in series with a resistance of 40 Ω and a cell of emf 2 V. The potential gradient along the wire is:

  • Q4 · Current Electricity · EASY

    The device used to measure electric current in a circuit is:

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