If the magnetic flux through a coil changes from 0.2 Wb to 0.5 Wb in 2 seconds, what is the average induced EMF in the coil? (2021)

1 question

1 item

Q: If the magnetic flux through a coil changes from 0.2 Wb to 0.5 Wb in 2 seconds, what is the average induced EMF in the coil? (2021)

Solution: Average induced EMF (ε) = -ΔΦ/Δt = -(0.5 Wb - 0.2 Wb) / 2 s = -0.3 Wb / 2 s = -0.15 V. The absolute value is 0.15 V or 150 mV.

Steps: 9

Step 1: Identify the initial magnetic flux (Φ_initial) which is 0.2 Wb.
Step 2: Identify the final magnetic flux (Φ_final) which is 0.5 Wb.
Step 3: Calculate the change in magnetic flux (ΔΦ) using the formula ΔΦ = Φ_final - Φ_initial.
Step 4: Substitute the values: ΔΦ = 0.5 Wb - 0.2 Wb = 0.3 Wb.
Step 5: Identify the time interval (Δt) which is 2 seconds.
Step 6: Use the formula for average induced EMF (ε): ε = -ΔΦ / Δt.
Step 7: Substitute the values: ε = -0.3 Wb / 2 s.
Step 8: Calculate the average induced EMF: ε = -0.15 V.
Step 9: The absolute value of the average induced EMF is 0.15 V or 150 mV.