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PUNJAB BOARD PREVIOUS YEAR PAPERS-Electric Current, Resistance and E.M.F. -Exercise
- A fuse wire is a wire of Low resistance and high melting point.
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- Why the fuse wire should have high resistance and low melting point?
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- One kilowatt hour is equal to
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- Which out of the following is used to make standard resistance
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- The rings on carbon resistance have colours in the sequence Red,Yellow...
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- With increase in temperature, resistance of metals :
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- For alloys the value of temperature coefficient of resistance is very ...
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- For metallic conductors the value of temperature coefficient of resist...
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- S.l. unit of electromotive force is volt. (True/False)
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- On what factor does the internal resistance of a cell depends?
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- With the help of a diagram derive the formula for the equivalent resis...
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- What is the internal resistance of a cell ? How it can be measured ?
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- What is Non-ohmic device ? Give one example.
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- What is a drift velocity ? Establish the relations between the drift v...
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- If drift velocity of electron as well as charge on electron is very sm...
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- Define internal resistance of a cell and find an expression for it.
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- Establish the relation between drift velocity of electrons and electri...
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- The number density of free electrons in a metal piece is a very large ...
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- Standard resistance coils are made up of which material why ?
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- What is the effect of the temperature on resistivity of metals
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