| 1. | A rectifier for welding has voltage/current characteristics as ? | |
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Drooping
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Rising
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Static
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Variable
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Report Question| 2. | The insulating material suitable for low temperature applications is ? | |
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Cork
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Diatomaceous earth
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Asbestos paper
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75 per cent magnesia
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| 3. | The method suitable for heating of conducting medium is ? | |
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Induction heating
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Indirect arc heating
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Eddy current heating
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Radiant heating
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| 4. | The number of valence electron in boron is ? | |
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1
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2
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3
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5
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| 5. | The potential barrier acts as a barrier against the flow of ? | |
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electrons only
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holes only
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electrons and holes
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None of these
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| 6. | The type of circuit that does not need a coupling capacitor is ? | |
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resistance loaded
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transformer coupled
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impedance coupled
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single-tuned
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| 7. | The plate current in a triode can be controlled by controlling ? | |
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plate voltage
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grid voltage
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plate voltage and grid voltage
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grid current
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| 8. | The CE amplifier is most commonly used because of ? | |
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less power gain
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less output voltage
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more power gain
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low cost
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| 9. | Synchronous motor shaft is made of ? | |
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Alnico
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Chrome steel
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Mild steel
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Stainless steel
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| 10. | When the voltage applied to a synchronous motor is increased, which of the following will reduce ? | |
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Stator flux
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Pull in torque
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Pull out torque
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None of these
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