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Question
Consider a solenoid carrying current supplied by a DC source with a constant emf containing iron core inside it. When the core is pulled out of the solenoid, the change in current will
Consider a solenoid carrying current supplied by a DC source with a constant emf containing iron core inside it. When the core is pulled out of the solenoid, the change in current will
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Solution
The correct option is C Increase
When the core is pulled out of solenoid, then the flux through it will decrease. So, according to Lenz's law, an emf is induced to increase the flux through the core. Magnetic flux increases with the increase in the current flowing through the coil. Thus change in current will increase.
When the core is pulled out of solenoid, then the flux through it will decrease. So, according to Lenz's law, an emf is induced to increase the flux through the core. Magnetic flux increases with the increase in the current flowing through the coil. Thus change in current will increase.
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