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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. In a typical Wheatstone network the resistances in cyclic order are A = 10 Ω, B = 10 Ω, C = 4 nand D = 4 Ω. For the bridge to be balanced.


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2. The internal resistance of a cell is the resistance of


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3. At what temperature will the resistance of a copper wire become three times its value at 0°C? (Temperature coefficient of resistance for copper = 4 x 10-3 per 0C)


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4. Read the following statements carefully Y: The resistivity of a semiconductor decreases with increase of temperature Z : In a conducting solid, rate of collisions between free electrons and ions increases with increases of temperature Select the correct statements (s) from the following


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5. Six identical cells of emf E and internal resistance r are connected in parallel, then the net emf and internal resistance of the combination will be


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