Chapter 12 of class 10 science as per the NCERT syllabus is Magnetic Effects of Electric Current which deals with Magnetic Field and Field Lines, Magnetic Field due to a Current, Right-Hand Thumb Rule, Solenoid, Electromagnet, Applications of Electromagnets, Magnetic Field due to a Current-Carrying Conductor, Electromagnetic Induction, Domestic Electric Circuits, etc.
Here, we have discussed 30 Multiple Choice Questions based on these topics of the chapter. These questions will help you to learn more about the chapter and test your knowledge.
For each question below, there are four options out of which only one option is correct. The correct answer to each question is given at the end for your reference.
MCQ on Class 10 Science Chapter 12
1. What is the property of a magnetic field that determines the force experienced by a moving charge?
A) Magnitude
B) Direction
C) Intensity
D) Polarity
2. How are magnetic field lines around a current-carrying conductor arranged?
A) Radially inward
B) Radially outward
C) Circular loops
D) Parallel to the conductor
3. According to Oersted’s experiment, what happens to a magnetic needle placed near a current-carrying conductor?
A) It remains unaffected
B) It deflects perpendicular to the conductor
C) It aligns parallel to the conductor
D) It oscillates randomly
4. Which rule helps determine the direction of the magnetic field around a current-carrying conductor?
A) Fleming’s rule
B) Right-hand thumb rule
C) Right-hand palm rule
D) Lenz’s law
5. What is the basic principle behind the construction of an electromagnet?
A) Magnetic induction
B) Magnetic field lines
C) Electric current
D) Magnetic poles
6. What type of core material is commonly used in the construction of electromagnets to increase their strength?
A) Aluminum
B) Copper
C) Iron
D) Plastic
7. In a solenoid, increasing the number of turns of the coil will:
A) Increase the magnetic field strength
B) Decrease the magnetic field strength
C) Not affect the magnetic field strength
D) Reverse the direction of the magnetic field
8. What is the purpose of using an electromagnet in an electric bell?
A) To produce sound waves
B) To generate electricity
C) To amplify the current
D) To attract and release a hammer
9. How does the strength of the magnetic field around a current-carrying solenoid change with an increase in the current passing through it?
A) Increases
B) Decreases
C) Remains constant
D) Reverses direction
10. Which device utilizes the magnetic effect of current to convert electrical energy into mechanical energy?
A) Loudspeaker
B) Electric heater
C) Electric bulb
D) Solar panel
11. What happens to the direction of the magnetic field inside a solenoid when the direction of current flow through it is reversed?
A) It remains unchanged
B) It becomes stronger
C) It becomes weaker
D) It reverses direction
12. How does the strength of the magnetic field produced by a solenoid change with an increase in the number of turns of wire in the coil?
A) Increases
B) Decreases
C) Remains constant
D) Becomes unpredictable
13. In a solenoid, the direction of the magnetic field inside the coil is determined by:
A) Right-hand thumb rule
B) Fleming’s rule
C) Lenz’s law
D) Right-hand palm rule
14. Which of the following is NOT an application of electromagnets?
A) Electric motor
B) Electric bell
C) Electric bulb
D) Loudspeaker
15. What happens to the strength of the magnetic field produced by a solenoid when the current passing through it is increased?
A) Increases
B) Decreases
C) Remains constant
D) Reverses direction
16. What is the purpose of using an electromagnet in a relay?
A) To produce sound waves
B) To amplify the current
C) To act as a switch
D) To generate heat
17. What type of core material is preferred for making an electromagnet?
A) Rubber
B) Copper
C) Iron
D) Aluminum
18. Which of the following devices utilizes the magnetic effect of current to convert electrical energy into kinetic energy?
A) Electric motor
B) Electric heater
C) Electric bulb
D) Solar panel
19. How does the strength of the magnetic field produced by a solenoid change with an increase in the current passing through it?
A) Increases
B) Decreases
C) Remains constant
D) Reverses direction
20. In an electric bell, the hammer strikes the gong due to the:
A) Magnetic repulsion
B) Magnetic induction
C) Magnetic attraction
D) Magnetic field reversal
21. What happens to the strength of the magnetic field produced by a solenoid when the number of turns of wire in the coil is increased?
A) Increases
B) Decreases
C) Remains constant
D) Becomes unpredictable
22. Which of the following is NOT an application of the magnetic effect of current?
A) Electric bell
B) Electric bulb
C) Electric heater
D) Electric motor
23. The strength of the magnetic field produced by a solenoid depends on:
A) Current passing through it
B) Length of the solenoid
C) Number of turns in the coil
D) All of the above
24. What determines the direction of the magnetic field inside a solenoid?
A) Right-hand thumb rule
B) Left-hand thumb rule
C) Right-hand palm rule
D) Lenz’s law
25. What is the basic principle behind the working of an electric motor?
A) Electromagnetic induction
B) Magnetic effect of current
C) Electric resistance
D) Photoelectric effect
26. Which material is used as the core of an electromagnet to increase its magnetic strength?
A) Copper
B) Aluminum
C) Iron
D) Plastic
27. In a solenoid, what is the effect of increasing the current passing through it on the strength of the magnetic field?
A) Increases
B) Decreases
C) Remains constant
D) Reverses direction
28. What is the purpose of using an electromagnet in a loudspeaker?
A) To produce sound waves
B) To generate electricity
C) To amplify the current
D) To create light
29. How does the strength of the magnetic field produced by a solenoid change with an increase in the length of the solenoid?
A) Increases
B) Decreases
C) Remains constant
D) Becomes unpredictable
30. In an electric bell, what is the role of the electromagnet?
A) To produce sound waves
B) To amplify the current
C) To attract and release a hammer
D) To generate heat
Correct Answers
Here is the list of correct answers to the above questions.
- B) Direction
- C) Circular loops
- B) It deflects perpendicular to the conductor
- B) Right-hand thumb rule
- C) Electric current
- C) Iron
- A) Increase the magnetic field strength
- D) To attract and release a hammer
- A) Increases
- A) Loudspeaker
- D) It reverses direction
- A) Increases
- A) Right-hand thumb rule
- C) Electric bulb
- A) Increases
- C) To act as a switch
- C) Iron
- A) Electric motor
- A) Increases
- C) Magnetic attraction
- A) Increases
- D) Electric motor
- D) All of the above
- A) Right-hand thumb rule
- B) Magnetic effect of current
- C) Iron
- A) Increases
- A) To produce sound waves
- A) Increases
- C) To attract and release a hammer
The Bottom Line
I hope these 30 MCQs on Magnetic Effects of Electric Current of Class 10 Science Chapter 12 have helped you in your studies and preparation.
If you have any queries, or comments or find any mistake in the above questions, feel free to contact me in the comment section below.
I would love to hear from you.
Abdur Rohman is an Electrical Engineer from Charaideo, Assam, who wears multiple hats as a part-time teacher, blogger, entrepreneur, and digital marketer. Passionate about education, he founded The Assam School blog to provide free, comprehensive textbook solutions, MCQs (Multiple Choice Questions), and other academic content for students from Class V to XII.