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Physics - Current Electricity Questions and Answer >>

1 2 3 4 5  Next >>  Page 1 of 10 pages (50 Objective Questions)

1. A wire of 50 cm long and 1 mm² in cross-sectional area carries a current 4A when connected to a 2V battery. The resistivity of the wire is


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2. The internal resistance of a cell of emf 12 V is 5 x 10 -2 Ω . It is connected across an unknown resistance. Voltage across the cell, when a current of 60 A is drawn from it, is


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3. The resistance of a wire is R. If the length of the wire is doubled by stretching, then the new resistance will be


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4. If six identical cells each having an emf of 6 V are connected in parallel, the emf of the combination is


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5. In the circuit shown in figure, the current drawn from the battery is 4 A. If 10 Ω resistor is replaced by 20Ω resistor, the current further drawn from the circuit will be .


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