Subject

Physics

Class

ICSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsShort 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 ?
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3. What is the work done in turning an electric dipole through 360° ?


Amount of work done in turning the dipole through 360° is,

W = -PE [cos θ1 - cos θ2]

   = -PE [cos 0° - cos 360°]

   = 0. 

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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 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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