NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Induction
NEET · Physics · Electromagnetic Induction
Given below are two statements: one is labelled as Assertion (A)...
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): When two coaxial circular coils carrying steady currents in the same direction are moved towards each other, the current in each coil decreases.
Reason (R): Two coaxial circular coils carrying currents in the same direction attract each other.
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion (A): When two coaxial circular coils carrying steady currents in the same direction are moved towards each other, the current in each coil decreases.
Reason (R): Two coaxial circular coils carrying currents in the same direction attract each other.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
Step-by-step solution
Assertion (A) is true: When the coils are moved towards each other, the magnetic flux linked with each coil due to the magnetic field of the other coil increases. According to Lenz's law, an induced EMF is generated in each coil to oppose this increase in flux. To oppose the increase, the induced EMF acts in a direction opposite to the main current, causing the net current in each coil to decrease.
Reason (R) is true: Coils carrying currents in the same direction behave similarly to parallel conductors carrying currents in the same direction, which experience a magnetic force of attraction.
However, (R) is not the correct explanation for (A). The decrease in current is explained by electromagnetic induction and Lenz's law, not by the mechanical force of attraction between the coils.
Answer: Both (A) and (R) are true but (R) is not the correct explanation of (A)
Reason (R) is true: Coils carrying currents in the same direction behave similarly to parallel conductors carrying currents in the same direction, which experience a magnetic force of attraction.
However, (R) is not the correct explanation for (A). The decrease in current is explained by electromagnetic induction and Lenz's law, not by the mechanical force of attraction between the coils.
Answer: Both (A) and (R) are true but (R) is not the correct explanation of (A)