Current Electricity

Related Questions

• A galvanometer, having a resistance of 50 $\Omega$ gives a full scale deflection for a current of 0.05 A. The length in meter of a resistance wire of area of cross-section $2.97 \times 10^{–2} cm^2$ that can be used to convert the galvanometer into an ammeter which can read a maximum of 5 A current is (Specific resistance of the wire = $5 \times {10^{ - 7}} \Omega m$)

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• A current of two amperes is flowing through a cell of e.m.f. 5 volts and internal resistance 0.5 ohm from negative to positive electrode. If the potential of negative electrode is 10V, the potential of positive electrode will be

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• Which arrangement of four identical resistances should be used to draw maximum energy from a cell of voltage V

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• The current from the battery in circuit diagram shown is

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• What is the ratio of heat generated in R and 2R

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