SSC JE Electrical Engineering 24th Jan 2018 Shift-1

Instructions

For the following questions answer them individually

Question 121

Which one of the following statement is TRUE about reluctance?

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Question 122

Which property of a material supports the passage of magnetic flux through it?

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Question 123

Which of the following is the CORRECT expression for the eddy current loss occurring in a material?

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Question 124

Which one of the following is the CORRECT expression for the self inductance of a solenoid?

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Question 125

What will be the intensity of magnetization (in A/m) of a magnet, when the pole strength of the magnet is 50 A-m and the pole area of the magnet is 0.5 sq. m?

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Question 126

Determine the current (in A) through a solenoid, when the coil has 130 turns and produced a mmf of 26 Amp-turns.

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Question 127

Determine the value of permeance (in H) of a coil, when the flux through the coil is 26 Wb and the value of produced mmf is 20 Amp-turns.

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Question 128

What will be the value of magnetic field intensity (in Amp-turns/m) of a 4 metre long coil, when the coil has 220 turns and carrying a current of 0.4 A?

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Question 129

Determine the value of self-inductance (in mH) of a 6-centimetre long air-cored solenoid, if the coil has 240 turns and the diameterofthe coil is 4 cm.

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Question 130

What will be value of magnetic field (in mT) at the centre of a 8 m long coil, when the coil has 260 turns and carrying a current of 4 A?

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