Sample Paper – 2009

Class – X

Subject – Physics

(SET-1)

1.     Name one physical condition on which the resistivity of a metal depend on?

2.     If a wire of length ‘l” is stretched  three times its original length what happens to its new resistance and resistivity?

3.     Name the physical quantity which carries the unit J/C ?

4.     what causes the current to flow in a conductor/

5.     Relate 1 joule and 1 volt.

6.     why is ammeter cannot be connected in parallel to a given resistor in a circuit?

7.     What is conductance ?  what happens to the conductivity of a conductor when its temperature is increased?

8.     When length of a wire is doubled what happens to its resistance?

9.     what is the commercial unit of electrical energy?

10.Name the material used for electric heater wires?

11.Light from bathroom bulb gets dimmer for a moment when geyser is switched on. Why?

• English 2006
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