﻿ Figure below shows a graph of emf‘e’ generated by an ac gene

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## ISC Class 12 Physics Solved Question Paper 2010

#### Multiple Choice Questions

1. Electric field intensity ‘E’ at a point P (Figure 1) at a perpendicular distance ‘r’ from an infinitely long line charge X’X having linear charge density X is given by:

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2. A moving coil galvanometer can be converted into a voltmeter by connecting:
• A low resistance in series with its coil.
• A low resistance in parallel with its coil.
• A high resistance in parallel with its coil.
• A high resistance in parallel with its coil.
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3. The loss of power in a transformer can be reduced by:
• Increasing the number of turns in primary
• Increasing ac voltage applied to primary.
• Using a solid core made of steel.
• Using a solid core made of steel.
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4. Which equation represents the emission of a beta particle by a radioactive nucleus:
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5. An important component of Michelson’s method to determine speed of light is:
• A NICOL prism
• A bi prism
• A grating
• A grating
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6. In an electric dipole, what is the locus of a point of zero potential?
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7.

What is the resistance of a carbon resistor whose coloured bands are shown below in figure below:

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8. A part of an electric circuit is shown below figure below:

Using Kirchhoffs 2nd Law, find the current I flowing through the 4 Ω resistor.
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# 9.Figure below shows a graph of emf‘e’ generated by an ac generator versus time ‘t’:What is the frequency of the emf?

The frequency of emf,
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10. Arrange the three types of magnetic materials, i.e., paramagnetic, diamagnetic and ferromagnetic materials, in decreasing order of their magnetic susceptibility.
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