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In a watt-meter there are four terminals:

M,L which are the current coils and

C,V which are called as pressure coils . .

To measure the current the measuring instrument should be placed in series with the load but in case of voltage, the instrument should be connected in parallel to the load . .

therefore M from the current coil and C from the pressure coil are can be short-circuited to measure the power of the given circuit.

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hameed khan md, hyderabad

e-mail:hameed.shonnu@gmail.com

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13y ago
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10y ago

n a watt-meter there are four terminals:
M,L which are the current coils and
C,V which are called as pressure coils . .
To measure the current the measuring instrument should be placed in series with the load but in case of voltage, the instrument should be connected in parallel to the load . .
therefore M from the current coil and C from the pressure coil are can be short-circuited to measure the power of the given circuit

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Q: Why are the M and C terminals of a watt meter short circuited?
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