The component of the external magnetic field along the central axis of a 33 turn circular coil of radius 27.0 cm decreases from 1.90 T to 0.400 T in 2.90 s. If the resistance of the coil is R = 6.00 52, what is the magnitude of the induced current in the coil? magnitude: What is the direction of the current if the axial component of the field points away from the viewer? O counter-clockwise

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## Induced Current in a Circular Coil

**Problem Statement:**

The component of the external magnetic field along the central axis of a 33 turn circular coil of radius 27.0 cm decreases from 1.90 T to 0.400 T in 2.90 s. If the resistance of the coil is \( R = 6.00 \, \Omega \), what is the magnitude of the induced current in the coil?

- **Magnitude:** \( \boxed{} \, \text{A} \)

### Direction of the Induced Current:

- What is the direction of the current if the axial component of the field points away from the viewer?
  - [ ] Counter-clockwise
  - [ ] Clockwise

### Explanation:

To find the induced current in the coil, we use Faraday's Law of Induction which states that the induced electromotive force (emf) in the coil is given by:

\[ \mathcal{E} = -N \frac{d\Phi_B}{dt} \]

Where:
- \( N \) is the number of turns
- \( \Phi_B \) is the magnetic flux
- \( \frac{d\Phi_B}{dt} \) is the rate of change of magnetic flux

The magnetic flux \( \Phi_B \) through one turn of the coil is given by:

\[ \Phi_B = B \cdot A \]

Where:
- \( B \) is the magnetic field
- \( A \) is the area of the coil (\( A = \pi r^2 \))

Given data:
- \( N = 33 \)
- \( r = 27.0 \, \text{cm} = 0.270 \, \text{m} \)
- \( B \) changes from \( 1.90 \, \text{T} \) to \( 0.400 \, \text{T} \) in \( 2.90 \, \text{s} \)
- \( R = 6.00 \, \Omega \)

The change in magnetic flux \( \Delta \Phi_B \) is:

\[ \Delta \Phi_B = \Phi_B (\text{final}) - \Phi_B (\text{initial}) \]
\[ \Delta \Phi_B = (0.400 \, \text{T} \cdot \pi \cdot (0
Transcribed Image Text:## Induced Current in a Circular Coil **Problem Statement:** The component of the external magnetic field along the central axis of a 33 turn circular coil of radius 27.0 cm decreases from 1.90 T to 0.400 T in 2.90 s. If the resistance of the coil is \( R = 6.00 \, \Omega \), what is the magnitude of the induced current in the coil? - **Magnitude:** \( \boxed{} \, \text{A} \) ### Direction of the Induced Current: - What is the direction of the current if the axial component of the field points away from the viewer? - [ ] Counter-clockwise - [ ] Clockwise ### Explanation: To find the induced current in the coil, we use Faraday's Law of Induction which states that the induced electromotive force (emf) in the coil is given by: \[ \mathcal{E} = -N \frac{d\Phi_B}{dt} \] Where: - \( N \) is the number of turns - \( \Phi_B \) is the magnetic flux - \( \frac{d\Phi_B}{dt} \) is the rate of change of magnetic flux The magnetic flux \( \Phi_B \) through one turn of the coil is given by: \[ \Phi_B = B \cdot A \] Where: - \( B \) is the magnetic field - \( A \) is the area of the coil (\( A = \pi r^2 \)) Given data: - \( N = 33 \) - \( r = 27.0 \, \text{cm} = 0.270 \, \text{m} \) - \( B \) changes from \( 1.90 \, \text{T} \) to \( 0.400 \, \text{T} \) in \( 2.90 \, \text{s} \) - \( R = 6.00 \, \Omega \) The change in magnetic flux \( \Delta \Phi_B \) is: \[ \Delta \Phi_B = \Phi_B (\text{final}) - \Phi_B (\text{initial}) \] \[ \Delta \Phi_B = (0.400 \, \text{T} \cdot \pi \cdot (0
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