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Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is
0.01.
0.477.
0.447.
0.577.
0.01.
0.477.
0.447.
0.577.
Answer
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Related Question
Electromagnetic Field Theory
The skip distance is the maximum distance upto which ionospheric reflection is possible.
False
True
False
True
Answer
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Electromagnetic Field Theory
A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position
5 × 10-5 ux N.
5 × 10-5 uy N.
- 5 × 10-5 uy N.
5 × 10-5 uz N.
5 × 10-5 ux N.
5 × 10-5 uy N.
- 5 × 10-5 uy N.
5 × 10-5 uz N.
Answer
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Electromagnetic Field Theory
The magnetic intensity in A/m at the centre of circular coil of diameter 1m and carrying a current of 2A is
3.
4.
2.
8.
3.
4.
2.
8.
Answer
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Electromagnetic Field Theory
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.
0.6m.
5.25m.
0.5m.
6.25m.
0.6m.
5.25m.
0.5m.
6.25m.
Answer
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Electromagnetic Field Theory
A conductor of length 1 metre moves at right angles to magnetic field of flux density 1 Wb/m2 with a velocity of 25 m/s. The induced emf in the conductor will be
75 V.
25 V.
50 V.
100 V.
75 V.
25 V.
50 V.
100 V.
Answer
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