| 1. | The magnitude of stator back e.m.f. (Eb) of a synchronous motor depends on ? | |
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d.c. excitation only
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load on the motor
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both the speed and rotor flux
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None of these
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Report Question| 2. | The S.I unit of electrical energy is ? | |
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Watt
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Volts
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Ampere
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Joule
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| 3. | Which one of the following is the CORRECT expression for the heat generated in a conductor ? | |
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NX
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RNX
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X/N
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N^2X
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| 4. | The resistivity of a conductor depends upon ? | |
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pressure
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temperature
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degree of illumination
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shape of cross-section
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| 5. | Which one of the following statement is TRUE ? | |
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The equivalent resistance in series combination is larger than the largest resistance in the combination.
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The equivalent resistance in series combination is smaller than the largest resistance in the combination.
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The equivalent resistance in series combination is equal to the smallest resistance in the combination.
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The equivalent resistance in series combination is equal to the largest resistance in the combination.
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| 6. | Determine the energy (in 3) stored by a 0.4 H inductance, if the current flowing through it is 2 A ? | |
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1.6
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0.8
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0.4
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1.4
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| 7. | What will be the voltage (in V) across a 8 H inductor, when the rate of change of current in the inductor is 0.5 A/sec ? | |
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2
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6
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4
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8
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| 8. | What will the equivalent capacitance (in mF) of three capacitors connected in a series having capacitance of 0.04 mF, 0.08 mF and 0.02 mF respectively ? | |
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0.026
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0.032
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0.065
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0.011
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| 9. | Determine the voltage (in V) of a battery connected to a parallel plate capacitor (filled with air) when the area of the plate is 10 square centimetres, the separation between the plates is 5 mm and the charged stored on the plates is 20 pC. ? | |
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12.3
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10.3
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11.3
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14.3
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| 10. | Which one of the following statement is TRUE ? | |
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Kirchhoff's law is not applicable to circuits with passive elements.
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Kirchhoff's law is not applicable to circuits with lumped parameters.
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Kirchhoff's law is not applicable to circuits with non-linear resistances.
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Kirchhoff's law is not applicable to circuits with distributed elements.
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