Question – 1
1. Circuits can be protected from high voltage surges by using ____________.
-
A. avalanche diodes
-
B. zener diodes
-
C. light emitting diodes
-
D. tunnel diodes
- Answer:A
- Answer Explanation:
Question – 2
2. In an RL circuit, when an inductor is added in series with the circuit inductance, the time constant ____________.
-
A. decreases
-
B. increases
-
C. remains same
-
D. rises gradually and suddenly drops
- Answer:A
- Answer Explanation:
Question – 3
3. ___________ gate consists of a NOT gate and an OR gate connected in series.
-
A. NAND
-
B. AND
-
C. NOR
-
D. XOR
- Answer:C
- Answer Explanation:
Question – 4
4. A potentiometer has __________ connections.
-
A. 2
-
B. 3
-
C. 4
-
D. 6
- Answer:B
- Answer Explanation:
Question – 5
5. By ohm’s law, when voltage increases and resistance remains the same, _________.
-
A. the current increases
-
B. the power increases
-
C. the power decreases
-
D. the current decreases
- Answer:A
- Answer Explanation:
Question – 6
6. When an incandescent light bulb is operated at a voltage less than the rated voltage, then the bulb will burn ________.
-
A. brighter and last longer
-
B. dimmer and last longer
-
C. brighter but won’t last longer
-
D. dimmer but won’t last longer
- Answer:B
- Answer Explanation:
Question – 7
7. The gap formed when an electron jumps to the conduction band from the valence shell is called ________.
-
A. a hole
-
B. an energy gap
-
C. a dopant
-
D. None of the above
- Answer:A
- Answer Explanation:
Question – 8
8. When impurities are added in an intrinsic semiconductor, _________ can be controlled.
-
A. resistivity
-
B. electricity
-
C. conductivity
-
D. power
- Answer:C
- Answer Explanation:
Question – 9
9. _________ law states that emf depends on the rate of cutting flux.
-
A. Ohm’s
-
B. Kirchhoff’s
-
C. Newton’s
-
D. Faraday’s
- Answer:D
- Answer Explanation:
Question – 10
10. When the magnetic field of an inductor gets collapsed, ___________.
-
A. voltage is induced
-
B. voltage remains constant
-
C. current will be doubled
-
D. None of the above
- Answer:A
- Answer Explanation:
Question – 11
11. The number of ___________ found in the nucleus determines an atom’s atomic number.
-
A. Protons
-
B. Neutrons
-
C. Electrons
-
D. Shells
- Answer:A
- Answer Explanation:
Question – 12
12. Which of the following materials have lots of free electrons?
-
A. Semiconductors
-
B. Filters
-
C. Insulators
-
D. Conductors
- Answer:D
- Answer Explanation:
Question – 13
13. When ___________, the current flows in a circuit.
-
A. there is no voltage
-
B. a switch is opened
-
C. a switch is closed
-
D. None of the above
- Answer:C
- Answer Explanation:
Question – 14
14. The first shell that is closest to the nucleus can hold a maximum of ________.
-
A. 8 electrons
-
B. 2 electrons
-
C. 2 protons
-
D. 8 protons
- Answer:B
- Answer Explanation:
Question – 15
15. The outer shell of an atom is known as the __________.
-
A. valence shell
-
B. electron shell
-
C. sub shell
-
D. nucleus shell
- Answer:A
- Answer Explanation: