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Week # 1 Quiz 2
A coil has inductance 8H. Find the induced EMF in it, if the rate of change of current in the coil is 8 A/s ?
If a charged linear time-in varient capacitor is connected across an uncharged capacitor, then the waveform of the charging current will be
What is the flux density in a magnetic field of cross-sectional area 20 \(cm^2\) having a flux of 3 mWb?
The peak value of a sine wave is 200 V. Its average value is
If \(f_1\) and \(f_2\) are half-power frequencies, such that \(f_2> f_1\), then the bandwidth B =__________.
\(f_2 + f_1\)
Which of the following factor have value of 1.1 for sinusoidal alternating current only?
Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.
What will be the Magnetomotive force in a coil having 250 turns and carrying a current of 10A ?
State true or false for the following statements.
1. A toroidal magnet has no air gap.
2. The unit of mmf is Wb/Ampere.
If the distance between two point charges of Electricity is doubled, the electrostatic force between them will be
same as original force
1/2 of the original force
1/4 of the original force
double the original force
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