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Solved: “Smart" traffic lights are controlled by loops of
Chapter 23, Problem 99PP(choose chapter or problem)
A car drives onto a loop detector and increases the downward component of the magnetic field within the loop from \(1.2 \times 10^{-5} T \text { to } 2.6 \times 10^{-5} T \text { in } 0.38 \mathrm{~s}\). What is the induced emf in the detector if it is circular, has a radius of 0.67 m, and consists of four loops of wire?
\(0.66 \times 10^{-4} \mathrm{~V}\)
B. \(0.66 \times 10^{-4} \mathrm{~V}\)
C. \(2.1 \times 10^{-4} \mathrm{~V}\)
D. \(6.2 \times 10^{-4} \mathrm{~V}\)
Equation Transcription:
Text Transcription:
1.2 x 10^-5 T to 2.6 x 10^-5 T in 0.38 s
0.66 x 10^-4 V
0.66 x 10^-4 V
2.1 x 10^-4 V
6.2 x 10^-4 V
Questions & Answers
QUESTION:
A car drives onto a loop detector and increases the downward component of the magnetic field within the loop from \(1.2 \times 10^{-5} T \text { to } 2.6 \times 10^{-5} T \text { in } 0.38 \mathrm{~s}\). What is the induced emf in the detector if it is circular, has a radius of 0.67 m, and consists of four loops of wire?
\(0.66 \times 10^{-4} \mathrm{~V}\)
B. \(0.66 \times 10^{-4} \mathrm{~V}\)
C. \(2.1 \times 10^{-4} \mathrm{~V}\)
D. \(6.2 \times 10^{-4} \mathrm{~V}\)
Equation Transcription:
Text Transcription:
1.2 x 10^-5 T to 2.6 x 10^-5 T in 0.38 s
0.66 x 10^-4 V
0.66 x 10^-4 V
2.1 x 10^-4 V
6.2 x 10^-4 V
ANSWER:
Solution 99PP
Step 1 of 3
We have to calculate the induced emf.