STANDARDPhysics-Electromagnetic Induction
STANDARD Physics Lenz's Law MCQ Question
Type: MCQ-conceptual-Medium-Class 12
When an iron core is inserted into the solenoid, the current will
A
increase
B
decrease
C
remains same
D
first increase then decrease
Correct Answer
Option B
Detailed Explanation
The current will decrease. This is because on inserting an iron core in the solenoid, the magnetic field increases and hence magnetic flux linked with the solenoid increases. As per Lenz's law, the emf induced in the solenoid will oppose this increase, which can be achieved by a decrease in current.
Found an issue with this question?
Related Questions
More from
What causes the electric current to be induced in coil C1 when coil C2 is moved relative to it?
Faraday's LawsPhysics
What is the induced emf generated across a conductor moving with speed v in a magnetic field B known as?
Motional EMFPhysics
Which of the following statements about motional EMF is correct?
Motional EMFPhysics