A circular loop of wire with the radius of 14.0 cm containing a 23.00 resistor is perpendicular to the uniform magnetic fields that starts out at 2.0 T and steadily decreases at 0.10 T/s. While this field is changing what is the value of the induced current in the wire loop?

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

A circular loop of wire with a radius of \(14.0 \, \text{cm}\) containing a \(23.0 \, \Omega\) resistor is perpendicular to uniform magnetic fields that start out at \(2.0 \, \text{T}\) and steadily decrease at \(0.10 \, \text{T/s}\). While this field is changing, what is the value of the induced current in the wire loop?

**Solution Explanation:**

To find the induced current, use Faraday's Law of Electromagnetic Induction, which states that the induced electromotive force (EMF) in a closed loop is equal to the negative rate of change of magnetic flux through the loop.

1. **Calculate the Area of the Loop**:
   \[
   A = \pi r^2 = \pi (0.14 \, \text{m})^2
   \]

2. **Find the Rate of Change of Magnetic Flux**:
   \[
   \text{d}\Phi/\text{dt} = A \times (-0.10 \, \text{T/s})
   \]

3. **Calculate the Induced EMF**:
   \[
   \text{EMF} = -\text{d}\Phi/\text{dt}
   \]

4. **Find the Induced Current** using Ohm's Law:
   \[
   I = \frac{\text{EMF}}{R}
   \]

The problem can thus be solved step-by-step through these calculations to find the induced current in the loop.
Transcribed Image Text:**Problem Statement:** A circular loop of wire with a radius of \(14.0 \, \text{cm}\) containing a \(23.0 \, \Omega\) resistor is perpendicular to uniform magnetic fields that start out at \(2.0 \, \text{T}\) and steadily decrease at \(0.10 \, \text{T/s}\). While this field is changing, what is the value of the induced current in the wire loop? **Solution Explanation:** To find the induced current, use Faraday's Law of Electromagnetic Induction, which states that the induced electromotive force (EMF) in a closed loop is equal to the negative rate of change of magnetic flux through the loop. 1. **Calculate the Area of the Loop**: \[ A = \pi r^2 = \pi (0.14 \, \text{m})^2 \] 2. **Find the Rate of Change of Magnetic Flux**: \[ \text{d}\Phi/\text{dt} = A \times (-0.10 \, \text{T/s}) \] 3. **Calculate the Induced EMF**: \[ \text{EMF} = -\text{d}\Phi/\text{dt} \] 4. **Find the Induced Current** using Ohm's Law: \[ I = \frac{\text{EMF}}{R} \] The problem can thus be solved step-by-step through these calculations to find the induced current in the loop.
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