Basic Electronic MCQs - Electronic Engineering
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Basic Electronic Objective Type Questions. Unit: Semiconductor Diode and applications. Start practicing now for exams, online tests, quizzes, and Interviews!
- remains constant
- increases
- decreases
- first increases and then decreases
Question 1: With rise in temperature the resistance of semi-conductors?
Answers: decreases
- increases
- remains constant
- decreases
- first increases and then decreases
Question 2: With rise in temperature the resistance of pure metals?
Answers: increases
- circuits with low current densities
- carbon resistors
- high voltage circuits
- vacuum tubes
Question 3: Ohm's law is not applicable to?
Answers: vacuum tubes
- 65 ohms
- 5 ohms
- 10 ohms
- 15 ohms
Question 4: Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel. The total resistance of the combination is?
Answers: 5 ohms
- positive temperature coefficient
- variable temperature coefficient
- negative temperature coefficient
- zero temperature coefficient
Question 5: A thermistor has?
Answers: negative temperature coefficient
- become zero
- increase
- reduce
- decrease
Question 6: When one leg of parallel circuit is opened out the total current will?
Answers: decrease
- about 2 ohms per degree
- Positive
- negative
- zero
Question 7: The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is?
Answers: Positive
- Copper
- Porcelain
- Manganin
- Carbon
Question 8: Which of the following material has nearly zero temperature co-efficient of resistance?
Answers: Manganin
- zero
- infinity
- about 50 ohms
- about 500 ohms
Question 9: A closed switch has a resistance of
Answers: zero
- sum of IR drops equals the applied e.m.f.
- both carry the same value of current
- total current equals the sum of branch currents
- same current passes in turn through both
Question 10: Two resistors are said to be connected in series when?
Answers: same current passes in turn through both
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