A circular conducting loop with a radius of 1.00 m and a small gap filled with a 10.0 resistor is oriented in the xy-pane. If a magnetic field of 2.0 T, making an angle of 30° with the z-axis increases to 9.0 T, in 2.0 s, what is the magnitude of the current that will be caused to flow in the conductor?

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Chapter1: Units, Trigonometry. And Vectors
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**Problem Statement**

A circular conducting loop with a radius of 1.00 m and a small gap filled with a 10.0 Ω resistor is oriented in the xy-plane. If a magnetic field of 2.0 T, making an angle of 30° with the z-axis increases to 9.0 T, in 2.0 s, what is the magnitude of the current that will be caused to flow in the conductor?

**Analysis**

This problem involves electromagnetic induction, where a changing magnetic field induces an electromotive force (EMF) in a conducting loop. This induced EMF will create a current, which flows through the resistor in the loop. 

**Solution**

To solve this, use Faraday’s Law of Induction, which states that the induced EMF in a loop is equal to the negative rate of change of magnetic flux through the loop. The formula can be expressed as:

\[ \text{EMF} = -\frac{\Delta \Phi}{\Delta t} \]

where \(\Delta \Phi\) is the change in magnetic flux and \(\Delta t\) is the change in time.

Next, calculate the magnetic flux (\(\Phi\)), given by:

\[ \Phi = B \cdot A \cdot \cos(\theta) \]

where:
- \(B\) is the magnetic field strength,
- \(A\) is the area of the loop (\(A = \pi r^2\), with \(r\) being the radius of the loop),
- \(\theta\) is the angle between the magnetic field and the normal to the loop.

**Step-by-step Calculations:**

1. Calculate the area of the loop:
   \[ A = \pi (1.00 \, \text{m})^2 = \pi \, \text{m}^2 \]

2. Determine the initial and final magnetic flux:
   \[ \Phi_{\text{initial}} = 2.0 \, \text{T} \cdot \pi \, \text{m}^2 \cdot \cos(30^\circ) \]
   \[ \Phi_{\text{final}} = 9.0 \, \text{T} \cdot \pi \, \text{m}^2 \cdot \cos(30^\circ) \]

3. Calculate the change in magnetic flux
Transcribed Image Text:**Problem Statement** A circular conducting loop with a radius of 1.00 m and a small gap filled with a 10.0 Ω resistor is oriented in the xy-plane. If a magnetic field of 2.0 T, making an angle of 30° with the z-axis increases to 9.0 T, in 2.0 s, what is the magnitude of the current that will be caused to flow in the conductor? **Analysis** This problem involves electromagnetic induction, where a changing magnetic field induces an electromotive force (EMF) in a conducting loop. This induced EMF will create a current, which flows through the resistor in the loop. **Solution** To solve this, use Faraday’s Law of Induction, which states that the induced EMF in a loop is equal to the negative rate of change of magnetic flux through the loop. The formula can be expressed as: \[ \text{EMF} = -\frac{\Delta \Phi}{\Delta t} \] where \(\Delta \Phi\) is the change in magnetic flux and \(\Delta t\) is the change in time. Next, calculate the magnetic flux (\(\Phi\)), given by: \[ \Phi = B \cdot A \cdot \cos(\theta) \] where: - \(B\) is the magnetic field strength, - \(A\) is the area of the loop (\(A = \pi r^2\), with \(r\) being the radius of the loop), - \(\theta\) is the angle between the magnetic field and the normal to the loop. **Step-by-step Calculations:** 1. Calculate the area of the loop: \[ A = \pi (1.00 \, \text{m})^2 = \pi \, \text{m}^2 \] 2. Determine the initial and final magnetic flux: \[ \Phi_{\text{initial}} = 2.0 \, \text{T} \cdot \pi \, \text{m}^2 \cdot \cos(30^\circ) \] \[ \Phi_{\text{final}} = 9.0 \, \text{T} \cdot \pi \, \text{m}^2 \cdot \cos(30^\circ) \] 3. Calculate the change in magnetic flux
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