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GATE 2019: Electromagnetic Theory Quiz 5

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Question 1

According to the Biot-Savart law, the magnetic field intensity at any point P produced by a differential element is inversely proportional to the:

Question 2

The flux density at a point in space is given by B = 4xax + 2kyay +8az Wb/m2. The value of constant k must be equal to

Question 3

Which of the following equation is known as the Lorentz force equation?

Question 4

A current of 28 A flows in a toroid coil of 600 turns. If the coil has a self-inductance of 120 mH, determine the flux linkages.

Question 5

Find ∇xA at [2, -1, 1] if A = x3zi -3x2yzj + 2xy4k?

Question 6

The self-inductance of the primary winding of a single phase, 50 Hz, transformer is 800 mH, and that of the secondary winding is 600 mH. The mutual inductance between these two windings is 480 mH. The secondary winding of this transformer is short circuited and the primary winding is connected to a 50 Hz, single phase, and sinusoidal voltage source. The current flowing in both the windings is less than their respective rated currents. The resistance of both windings can be neglected. In this condition, what is the effective inductance (in mH) seen by the source?
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Sep 25ESE & GATE EE