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MBD -HARYANA BOARD-MAGNETIC EFFECTS OF ELECTRIC CURRENT-EXAMPLE
- What is meant by over-loading?
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- When does an electric short-circuit occur?
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- What are hazards of electricity?
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- A dynamo
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- On what principle is a.c.motor based?
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- What is electric motor ?
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- List three sources of magnetic fields.
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- Name the physical qanitity whose S.I. unit is weber/m^2.
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- Inside a bar magnetic the magnetic field lines
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- Name some devices in which electric motors are used.
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- Define an elelctromagnet
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- Define the following terms. Magnetic South Pole
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- Name two electric devices which act on magnetic effect of electric cur...
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- What is an electric fuse? How does it function?
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- Which electrical phenomenon is responsible for deflection of galvonome...
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- What is the colour of neutral wire in a domestic electric circuit?
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- Connecting metallic fram eof high power electrical appliances with the...
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- Name some sources of direct current.
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- The device used for producing electric current is called a:
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- Magentic field lines are…..
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