Electromagnetic Induction (8 of 15) Induced Emf in a Coil of Wire, Example No. 2

TL;DR

Learn how changing magnetic flux induces voltage in a coil, calculating flux, EMF, and current direction.

Transcript

okay yes that's right in this video we're gonna be going over another example Orion talking about induced voltage in a coil of wire and this is the situation that we have we have this coil of wire which is 25 centimeters by 25 centimeters is a square coil of wire it's currently in this magnetic field which is designated by these dots which means th... Read More

Key Insights

• ⌛ Induced voltage in a coil occurs when magnetic flux changes over time.
• 🏑 Calculation of magnetic flux involves area, magnetic field strength, and angle.
• 💱 Faraday's Law relates changing magnetic flux to induced EMF in a coil.
• 🆘 Lenz's Law helps determine the direction of induced current in a moving coil.
• ⌛ Graphing magnetic flux over time illustrates changes during coil movement.
• ⌛ Induced EMF is directly related to the change in magnetic flux over time.
• ☠️ Calculation of induced voltage depends on the rate of change in magnetic flux.

Questions & Answers

Q: How does changing magnetic flux induce voltage in a coil?

Changing magnetic flux induces voltage in a coil when the amount of magnetic field inside the coil changes over time as per Faraday's Law.

Q: How do we calculate the magnetic flux in a coil at different time points?

Magnetic flux in a coil is calculated using the equation: Flux = Area x Magnetic Field x Cos(θ), with θ being the angle between coil and field.

Q: What is the process of determining induced EMF in a coil?

Induced EMF in a coil is calculated by finding the change in magnetic flux over time, following the equation: Induced EMF = -Change in Flux/Time.

Q: How is the direction of induced current determined in a moving coil?

The direction of induced current in a moving coil is determined using Lenz's Law, where the current flows to maintain the original magnetic conditions, producing a magnetic field in the opposite direction.

Summary & Key Takeaways

• Explanation of induced voltage in a coil due to changing magnetic flux.

• Calculation of magnetic flux at different time points during coil movement.

• Determination of induced EMF and current direction using Faraday's Law and Lenz's Law.