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MCQ on Electric Current for SSC

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Electric Current topic is considered one of the most important topics for all competitive exams. In general science, Physics plays a very crucial role in getting good marks and for that aspirants need to practice more and more MCQs. We are providing a practice set for the electric current topic so that students can go through these MCQs and fetch good marks in this section.

Important MCQ on Electric Current for SSC:

Que 1. Dynamo is used for the conversion of which of the following?
(a) High Voltage to Low Voltage
(b) Electrical energy to Mechanical energy
(c) Mechanical energy to Electrical energy
(d) Low Voltage to High Voltage

Ans. (c) Mechanical energy to Electrical energy
Explanation:  Dynamo is used for converting mechanical energy to electrical energy.

 

Que 2. The device which is used for converting chemical energy to electrical energy?
(a) Battery
(b) Motor
(c) Generator
(d) None of these

Ans. (a) Battery
Explanation: Battery is used for converting chemical energy to electrical energy.
 

Que 3. In 3 pin electrical plug, the longest pin is connected to which of the given options?
(a) Neutral terminal
(b) Ground terminal
(c) Live terminal
(d) None of these

Ans. (b) Ground terminal
Explanation: The longest pin in 3 pins electrical plug is connected to the ground terminal.
 

Que 4. In electric apparatus, ‘earth’ is used for which of the given purposes?
(a) For safety purposes
(b) As a Fuse
(c) To reduce expenditure
(d) To reduce current

Ans. (a) For safety purposes
Explanation: ‘Earth’ is used for safety purposes in electric apparatus.

 

Que 5. Which of the given is the best conductor of electricity?
(a) Copper
(b) Gold
(c) Aluminum
(d) Silver

Ans. (d) Silver
Explanation: Silver is the best conductor of electricity followed by copper, aluminum, and iron.

 

Que 6. When the electric current does not flow between two bodies, it means they have the same?
(a) Charge
(b) Resistivity
(c) Capacity
(d) Potential

Ans. (d) Potential
Explanation: When the electric current does not flow between two bodies, it means they have the same potential.

 

Que 7. What is the temperature of the filament of the lighted electric bulb?
(a) 1000 – 2000C
(b) 20000C – 25000C
(c) 5000C – 10000C
(d) 10000C – 15000C

Ans. (b) 20000C – 25000C
Explanation: The temperature of the filament of the lighted electric bulb is  20000C – 25000C.
 

Que 8. The filament of an electric bulb is made up of which of the given materials?
(a) Tungsten
(b) Nichrome
(c) Lead
(d) Aluminum

Ans. (a) Tungsten
Explanation: The filament of an electric bulb is made up of tungsten.

 

Que 9. We often use a fuse in the main electrical supply for safety, why?
(a) Due to its low resistance and high melting point
(b) Due to its low resistance and low melting point
(c) Due to its high resistance and low melting point
(d) Due to its high resistance and high melting point

Ans. (c) Due to its high resistance and low melting point
Explanation: We often use a fuse in the main electrical supply for safety due to its high resistance and low melting point.

 

Que 10. The filament of a halogen lamp is made up of which of the given options?
(a) Sodium and Iodine
(b) Tungsten and Iodine
(c) Tungsten and Bromine
(d) Tungsten and Sodium

Ans. (d) Tungsten and Sodium
Explanation: The filament of a halogen lamp is made up of tungsten and sodium.

 

Que 11. Which of the given gases filled in tube lights?
(a) Mercury vapor and Neon
(b) Mercury vapor and Argon
(c) Sodium vapor and Neon
(d) Sodium vapor and Argon

Ans. (b) Mercury vapor and Argon
Explanation: Mercury vapor and Argon gases are filled in normal tube lights.

 

Que 12. What is the full form of C.F.L?
(a) Compact Fluorescent Lamp
(b) Centrally Fixed lamp
(c) Chemical Fluorescent Lamp
(d) Condensed Fluorescent Lamp

Ans. (a) Compact Fluorescent Lamp
Explanation:  The full form of C.F.L is Compact Fluorescent Lamp.

 

Que 13. Why we preferred CFLs over electric bulbs? 
(a) CFLs are cost-effective
(b) CFLs have a long life
(c) CFLs transformed more electric energy into light energy
(d) All of the above

Ans. (d) All of the above
Explanation: We preferred CFLs over electric bulbs due to their cost-effectiveness, long life, and efficiency.

 

Que 14. White light produced in a tube due to?
(a) Heating up of copper wire
(b) Heating up of filament
(c) Acceleration of atoms
(d) Oscillation of molecules

Ans. (b) Heating up of filament
Explanation: White light is produced in a tube due to the heating up of filament.

 

Que 15. What color does a neutral wire have in an electric supply?
(a) Green
(b) White
(c) Black
(d) Red

Ans. (c) Black
Explanation: The color of the neutral wire is black.

 

Que 16. Domestic electrical supply wiring has what kind of connection?
(a) Parallel connection
(b) Series connection
(c) Both parallel and series connection
(d) None of these

Ans. (a) Parallel connection
Explanation: Domestic electrical supply wiring has a parallel connection.

 

Que 17. What is the color of a live wire?
(a) White
(b) Black
(c) Yellow
(d) Red

Ans. (d) Red
Explanation: The color of a live wire is red.

 

Que 18. A transformer is used for what purpose?
(a) To convert AC into DC voltages
(b) To convert DC into AC voltages
(c) To step up or step down AC voltages
(d) To step up DC voltages

Ans. (c) To step up or step down AC voltages
Explanation: A transformer is used to step up or step down AC voltages.

 

Que 19. A mobile charger is?
(a) A UPS
(b) A step-down transformer
(c) An inverter
(d) A step-up transformer

Ans. (b) A step-down transformer
Explanation: A mobile charger is a step-down transformer. 

 

Que 20. We often see a choke coil fitted with fluorescent tubes. What is the role of the choke coil?
(a) To step up the line voltage
(b) To step down the line voltage
(c) To reduce the current in a circuit
(d) To choke low-frequency current

Ans. (c) To reduce the current in a circuit
Explanation:  The role of the choke coil is to reduce the current in a circuit.
 



Last Updated : 26 Sep, 2022
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