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Subject

Physics

Class

ICSE Class 12

Pre Boards

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Sample Papers

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ISC Class 12 Physics Solved Question Paper 2006

Short Answer Type

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 ?

When electric field is 0, there will be constant electric potential because electric field is the gradient of electric potential.

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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 =

aθ space plus space 1 half βθ squared

;
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 θ_n 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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