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The knee voltage of a crystal diode is approximately equal to-

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Important Questions on Electronic Devices

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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 68
A p-n junction that radiates energy as light instead of heat is called -
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 69
A series resistance is connected in zener circuit to
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 70
The heavily doped portion of a transistor is
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 71
In a pnp transistor the current carriers are-
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 72
For active region of a transistor -
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 73
An n-p-n transistor can be considered to be equivalent to two diodes, connected. Which of the following figures is the correct one?
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 74
A working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P and Q, some resistance is seen on the multimeter. Which of the following is true for the transistor?
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 75
In a transistor the collector current is always less than the emitter current because