1.Can 8.6 x 10-19 coulomb of charge be given to a conductor ? Explain.
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2.What will be the nature of the electric potential at a place where the electric field E = 0 ?
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3.What is the work done in turning an electric dipole through 360° ?
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4.Why is a potentiometer preferred over a voltmeter in measuring the emf of a cell ?
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5.Two wires A and B of equal mass and of the same material are taken. The diameter of wire A is half the diameter of wire B. If the resistance of wire A is 24 Ω, calculate the resistance of wire B.
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6.In the circuit, the length of the wire AB = 400 cm. Where should the jockey, J be placed so that the galvanometer shows a zero deflection?
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7.The thermoelectric emf is given by,
E = ; where θ is the difference in temperature of the hot junction over the cold junction and α and β are constants.
Express the neutral temperature θn in terms of α and β.
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8.State the S.I. unit of the magnetic moment of a magnet, indicating its direction.
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9.An electron, moving with a velocity of 5 x 107 ms-1, enters a magnetic field of 1 wb m-2 at an angle of 30°. Calculate the force on the electron.
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10.State two factors on which the sensitivity of a moving coil galvanometer depends.
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