A coil of wire is placed in a changing magnetic field. What happens to the induc

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Question: A coil of wire is placed in a changing magnetic field. What happens to the induced current if the resistance of the coil is increased?

Options:

Correct Answer: Induced current decreases

Solution:

According to Ohm\'s law, if the resistance increases while the induced EMF remains constant, the induced current will decrease.

A coil of wire is placed in a changing magnetic field. What happens to the induced current if the resistance of the coil is increased?

A coil of wire is placed in a changing magnetic field. What happens to the induced current if the resistance of the coil is increased?

Step 1: Understand that a coil of wire in a changing magnetic field creates an induced current.
Step 2: Know that the induced current is related to the induced EMF (electromotive force) in the coil.
Step 3: Remember Ohm's law, which states that current (I) equals voltage (V) divided by resistance (R): I = V / R.
Step 4: If the resistance (R) of the coil increases and the induced EMF (V) stays the same, the current (I) will decrease.
Step 5: Conclude that increasing the resistance of the coil results in a lower induced current.

Electromagnetic Induction – The process by which a changing magnetic field induces an electromotive force (EMF) in a coil of wire.
Ohm's Law – The relationship between voltage (V), current (I), and resistance (R) in an electrical circuit, expressed as V = IR.