Question: What is the formula for calculating the induced EMF in a coil? (2023)
Options:
E = -dΦ/dt
E = R * I
E = V * I
E = L * di/dt
Correct Answer: E = -dΦ/dt
Exam Year: 2023
Solution:
The induced EMF in a coil is given by the formula E = -dΦ/dt, where Φ is the magnetic flux.
What is the formula for calculating the induced EMF in a coil? (2023)
Practice Questions
Q1
What is the formula for calculating the induced EMF in a coil? (2023)
E = -dΦ/dt
E = R * I
E = V * I
E = L * di/dt
Questions & Step-by-Step Solutions
What is the formula for calculating the induced EMF in a coil? (2023)
Step 1: Understand that EMF stands for Electromotive Force, which is the voltage generated by a coil when it experiences a change in magnetic flux.
Step 2: Know that magnetic flux (Φ) is the measure of the amount of magnetic field passing through a coil.
Step 3: Recognize that the formula for calculating the induced EMF (E) in a coil is E = -dΦ/dt.
Step 4: In this formula, 'dΦ' represents the change in magnetic flux, and 'dt' represents the change in time.
Step 5: The negative sign in the formula indicates the direction of the induced EMF, according to Lenz's Law, which states that the induced EMF will oppose the change in magnetic flux.
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