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Electric Circuits

Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 0.5.
 1.
 0.577.
 0.866.

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Electric Circuits
Condition for a balanced 3 - phase load is that, each phase has the same value of __________________.

 all of these.
 resistance.
 impedance.
 power factor.

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Electric Circuits
The breakdown voltage for paper capacitor is usually

 more than 10000 volts.
 200 to 1600 volts.
 2000 to 3000 volts.
 20 to 60 volts.

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Electric Circuits
For finding the Z11 parameter at the input port of a two port network

 output port is open circuited.
 input port is short circuited.
 input port is open circuited.
 output port is short circuited.

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Electric Circuits
A capacitor in a circuit became hot and ultimately exploded due to wrong connection, which type of capacitor it could be?

 Electrolytic capacitor.
 Any of above.
 Paper capacitor.
 Ceramic capacitor.

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Electric Circuits
A ceramic and a mica capacitor have the same physical dimension. Which has the higher value of capacitance?

 Ceramic capacitor.
 Mica capacitor.
  It is impossible to conclude on the basis of information supplied.
 Both have identical value of capacitor.

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