Chapter 3 Current Electricity – HI MCQ!

Sensitivity of potentiometer can be increased by?

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Why is the Wheatstone bridge better than the other methods of measuring resistances?

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A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves?

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In the absence of an electric field, the mean velocity of free electrons in a conductor at absolute temperature (T) is?

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The Kirchhoff’s second law (iR = E), where the symbols have their usual meanings, is based on?

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In the equation AB = C, A is the current density, C is the electric field, Then B is?

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Two cells of emfs approximately 5 V and 10 V are to be accurately compared using a potentiometer of length 400 cm.?

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To minimise the power loss in the transmission cables connecting the power stations to homes and factories, the transmission cables carry current?

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Question: Choose the correct option Assertion : A current flows in a conductor only when there is an electric field within the conductor. Reason : The drift velocity of electron in presence of electric field decreases.?

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To get maximum current in a resistance of 3 ohms, one can use n rows of m cells (connected in series) connected in parallel. If the total number of cells is 24 and the internal resistance of a cell is 0.5 ohms then?

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