Power Electronics

1. A diac has __________ pn junctions

1. Four
2. Two
3. Three
4. None of the above

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2. A diac has __________ semiconductor layers

1. Three
2. Two
3. Four
4. None of the above

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3. A diac has __________ terminals

1. Two
2. Three
3. Four
4. None of the above

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4. A diac is __________ switch

1. An c.
2. A d.c.
3. A mechanical
4. None of the above

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5. A diac is simply __________

1. A single junction device
2. A three junction device
3. A triac without gate terminal
4. None of the above

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6. A diac is turned on by __________

1. A breakover voltage
2. Gate voltage
3. Gate current
4. None of the above

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7. A triac can pass a portion of __________ half-cycle through the load

1. Only positive
2. Only negative
3. Both positive and negative
4. None of the above

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8. A triac has __________ semiconductor layers

1. Two
2. Three
3. Four
4. Five

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9. A Triac has three terminals viz __________

1. Drain, source, gate
2. Two main terminal and a gate terminal
3. Cathode, anode, gate
4. None of the above

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10. A triac is a __________ switch

1. Bidirectional
2. Unidirectional
3. Mechanical
4. None of the above

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