#### 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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