CBSE 12th Exams to Be Conducted From Feb 15: Check CBSE 12th Physics Chapter 6 Important Questions

CBSE 12th Physics Chapter 6 Important Questions: The Central Board of Secondary Education (CBSE) will hold the class 12 Board exams from Feb 15 till Apr 5, 2023. Therefore, all the students planning to appear for the exam must go through the CBSE 12th Physics chapter 6 important questions for preparation.

The Physics exam is scheduled for Mar 6, 2023. Students completing their CBSE 12th Physics revision must thoroughly study the sixth chapter, CBSE 12th Physics Electromagnetic Induction. Further, there are chances of high weightage questions from this section, so applicants must count the following in CBSE 12th Physics important questions.

Also Read: CBSE 12th Physics Chapter 5 Important Questions

CBSE 12th Physics Chapter 6 Important Questions

Candidates must refer to the following CBSE 12th Physics Chapter 6 Important Questions to prepare for the CBSE Physics exam 2023.

• Question 1: Which of the two, A plot of magnetic flux (ϕ ) versus current (I) as shown in the figure for two inductors A and B has larger value of self-inductance? 

Answer: Inductor A has larger value of self-inductance than inductor B.

• Question 2: Define self-inductance of a coil and write its S.I. unit. (All India 2010)

Answer: Self-induction is the property of a coil by virtue of which it opposes the growth or decay of the current flowing through it.
I. unit of self-inductance is henry (H).

• Question 3: Predict the polarity of the capacitor if two bar magnets are quickly moved towards a metallic loop connected across a capacitor ‘C’ as shown in the figure. (All India 2013)

Answer: When both magnets move towards loop, the A side plate of cL capacitor will be positive while the lower plate B is negative, making the induced current in a clockwise direction.

• Question 4: When the two magnets are quickly moved in the directions marked by arrows, predict the polarity of the capacitor.

Answer: Current in the coil will be anti-clockwise, when seen from the left, therefore plate A will become + ve (positive) and plate B will be negative.

• Question 5: If the current I in the wire is increasing steadily, predict the directions of induced currents in metal rings 1 and 2 lying in the same plane

Answer: In metal ring 1, the induced current flows in the clockwise direction. In metal ring 2, the induced current flows in the anticlockwise direction.

• Question 6: Predict the direction of induced current in a metal ring when the ring is moved towards a conductor is carrying current I in the direction shown in the figure.

Answer: Clockwise direction.

• Question 7: When the current I in the wire is steadily decreased, predict the directions of metal rings 1 and 2?

Answer: In metal ring 1, the induced current flows in Anticlockwise direction. In metal ring 2, the induced current flows in the Clockwise direction.

• Question 8: A bar magnet is moved in the direction indicated by the arrow between two coils PQ and CD. Predict the directions of induced current in each coil. (All India 2012)

Answer: By Lenz’s law, the ends of the coils closer to the magnet behave as a south pole. Hence the current induced in both coils will flow clockwise when seen from the magnet side.

• Question 9: State Lenz’s law. (Comptt. All India 2012)

Answer: Lenz’s law states that “the polarity of induced emf is such that it tends to produce a current, which opposes the change in magnetic flux that induced it.”