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A conductor with a rectangular cross-section has dimensions 4a×2a×a as shown in the figure. Resistance across AB is x, across CD is y, and across EF is z. Then, 

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Important Questions on Current Electricity

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The resistance of a wire is 20 Ω. If it is stretched up to three times of its length, then, its new resistance will be,
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Conductivity increases in the order of
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Two wires of the same dimensions but resistivity ρ1 and ρ2 are connected in series. The equivalent resistivity of the combination is:
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If on applying the potential of 20 V on a conductor its conductance becomes 8Ω-1, then the current flowing through it will be
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There are two wires of the same material and lengths. The cross-sections of the wires are different. If the diameter of the first wire is double that of the second wire, then the specific resistance of the first wire will be
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In the circuit shown, the equivalent resistance between points A and B is,

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Find the equivalent resistance between the terminals X and Y.

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The total current supplied to the circuit by the battery is

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