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Electric Circuits

Electric Circuits
When power factor angle is constant, then shape of the current locus is

 triangle.
 straight line.
 circle.
 semi circle.

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Electric Circuits
Which of the following has least resistivity?

 Copper.
 Mercury.
 Lead.
 Aluminium.

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

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Electric Circuits
An alternating voltage = 140 sinθ is supplied to a device which offers a resistance of 20 Ω in forward direction of current in reverse direction. Calculate the form factor.

 0.57.
 0.318.
 1.414.
 1.11.

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Electric Circuits
The mass of a neutron of atom is

 1.609 × 10 - 31 Kg.
 1.602 × 10 - 19 Kg.
 1.675 × 10 - 27 Kg.
 1.672 × 10 - 26 Kg.

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Electric Circuits
The absolute charge of an electron is

 1.6 × 10-19 C.
 none of above.
 + 1.6 × 10-19 C.
 - 1.6 × 10-19 C.

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