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PUNJAB BOARD PREVIOUS YEAR PAPERS-ELECTROMAGNETIC INDUCTION-EXERSICE
- What is the basic cause of induced e.m.f.?
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- What factors govern the direction of e.m.f. ?
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- Define Weber unit of Magnetic flux.
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- What is meant by magnetic flux? State its S.I. unit.
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- What are eddy currents ?
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- Define the term magnetic flux.
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- Weber is the unit of which physical quantity ?
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- State Lenz’s law of electromagnetic induction.
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- What is the basic cause of induced e.m.f.?
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- What is back emf ?
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- What is meant by magnetic flux? State its S.I. unit.
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- What is meant by magnetic flux? State its S.I. unit.
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- State Lenz’s law of electromagnetic induction.
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- Define S.I. unit of self inductance.
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- What is meant by magnetic flux? State its S.I. unit.
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- Define pH.
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- Define S.I. unit of self inductance.
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- State Lenz's rule to find direction of induced current.
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- State Lenz’s law.Give one example to illustrate it.
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- What are eddy currents ? Give experiment to explain their origion.
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