| 1. | Which one of the following statement is TRUE about reluctance ? | |
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Permeability is the reciprocal of reluctance.
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Reluctivity is the reciprocal of reluctance.
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Permeance is the reciprocal of reluctance.
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Susceptibility is the reciprocal of reluctance.
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Report Question| 2. | Which property of a material supports the passage of magnetic flux through it ? | |
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Permeance
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Reluctance
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Capacitance
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Inductance
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| 3. | 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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40
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60
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100
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120
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| 4. | 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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0.6
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0.5
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0.3
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0.2
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| 5. | 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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4.2
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3.6
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2.3
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1.3
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| 6. | 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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22
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24
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26
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30
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| 7. | Determine the value of self-inductance (in mH) of a 6-centimetre long air-cored solenoid, if the coil has 240 turns and the diameter of the coil is 4 cm ? | |
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1.212
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1.514
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1.614
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1.625
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| 8. | 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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0.465
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0.421
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0.262
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0.163
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| 9. | What will be the peak value of voltage (in V) of a voltage waveform, when the root mean square value of the voltage is 30 V ? | |
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42.42
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41.14
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40.24
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40.62
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| 10. | What will be the frequency (in Hz) of a sinusoidal wave, when the time-period of the wave is 2 ms ? | |
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400
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500
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600
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800
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