| 1. | Anderson Bridge is used for the measurement of an unknown ? | |
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reluctance
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resistance
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inductance
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conductance
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Report Question| 2. | Determine the required value of shunt resistance (in Ohms) to convert a galvanometer into ammeter for reading up to 12 A, when the internal resistance of the galvanometer is 30 Ohms and the value of current for full scale deflection is 0.1 A. ? | |
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0.15
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0.25
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0.35
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0.45
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| 3. | Determine the value of reactive power (in VAR) of a circuit having power factor of 0.6, when the apparent power of the circuit is 120 VA ? | |
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75
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78
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96
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56
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| 4. | Determine the secondary voltage (in V) of a potential transformer, when the value of the system voltage is 6600 V, the turn ratio of the potential transformer is 107 and the percentage voltage error of the transformer is 7% ? | |
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84.6
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76.4
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57.4
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59.2
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| 5. | No load rotational losses in electrical machine consists of ? | |
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Friction and windage losses
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Stator core, friction and windage losses
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Rotor core, friction and windage losses
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No load core, friction and windage losses
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| 6. | Transformers operating in parallel will share the load depends upon ? | |
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rating
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leakage reactance
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efficiency
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percentage impedance
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| 7. | In a DC series generator, the terminal voltage with increase in load will ? | |
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decrease
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increase gradually and then stay at rated voltage
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increase to rated voltage and then may decrease
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remain nearly constant
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| 8. | The working principle of transformer depends on ? | |
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coulombs law
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faradays law
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amperes law
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newtons law
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| 9. | The heat generated in the transformer is dissipated mainly by ? | |
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conduction
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radiation
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Convection
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All option are correct
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| 10. | In a 3-phase induction motor, the three-phase currents ia, ib and ic,each of equal magnitude, but differing in phase by ? | |
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360°
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280°
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210°
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120°
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