A loop of wire is placed in a uniform magnetic field. If the field strength is i
Practice Questions
Q1
A loop of wire is placed in a uniform magnetic field. If the field strength is increased, what happens to the induced EMF?
It increases
It decreases
It remains constant
It becomes zero
Questions & Step-by-Step Solutions
A loop of wire is placed in a uniform magnetic field. If the field strength is increased, what happens to the induced EMF?
Correct Answer: Induced EMF increases.
Step 1: Understand that a loop of wire in a magnetic field can have an induced EMF (electromotive force).
Step 2: Recall Faraday's law, which states that the induced EMF in a circuit is directly related to the rate of change of the magnetic field around it.
Step 3: Recognize that increasing the strength of the magnetic field means there is a change happening in the magnetic field.
Step 4: Conclude that since the magnetic field strength is increasing, the rate of change is also increasing.
Step 5: Therefore, according to Faraday's law, an increase in the magnetic field strength will result in an increase in the induced EMF.
Faraday's Law of Electromagnetic Induction – This law states that the induced EMF in a circuit is directly proportional to the rate of change of magnetic flux through the circuit.
Magnetic Flux – Magnetic flux is the product of the magnetic field strength and the area through which it passes, and it is a key factor in determining induced EMF.
