Question

6. (15 points) A heating coil is made up by winding the nichrome wire of radius r = 1.00 mm and length L = 120 m. If the voltage of 120 V is applied across the coil, what power is dissipated in it? (The resistivity of nichrome is 1.50x10?? ? · m). If the voltage is kept the same, which of the following statements is (are) correct: A. If the wire were longer, the power would be greater; B. If the wire were longer, the power would be lesser; C. If the radius of the wire were larger, the power would be lesser; D. If the radius of the wire were larger, the power would be greater; E. A and C; F. B and D.

          6. (15 points) A heating coil is made up by winding the nichrome wire of radius r = 1.00 mm and length L = 120 m. If the voltage of 120 V is applied across the coil, what power is dissipated in it? (The resistivity of nichrome is 1.50x10?? ? · m).

If the voltage is kept the same, which of the following statements is (are) correct:

A. If the wire were longer, the power would be greater;
B. If the wire were longer, the power would be lesser;
C. If the radius of the wire were larger, the power would be lesser;
D. If the radius of the wire were larger, the power would be greater;
E. A and C;
F. B and D.

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6. (15 points) A heating coil is made up by winding the nichrome wire of radius r = 1.00 mm and length L = 120 m. If the voltage of 120 V is applied across the coil, what power is dissipated in it? (The resistivity of nichrome is 1.50x10?? ? · m).

If the voltage is kept the same, which of the following statements is (are) correct:

A. If the wire were longer, the power would be greater;
B. If the wire were longer, the power would be lesser;
C. If the radius of the wire were larger, the power would be lesser;
D. If the radius of the wire were larger, the power would be greater;
E. A and C;
F. B and D.

Added by Richard M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Penny Riley

02/28/2022

Step 1

00 \, mm = 0.001 \, m \) Calculate the cross-sectional area, \( A = \pi r^2 \): \[ A = \pi \times (0.001)^2 = 3.14159 \times 10^{-6} \, m^2 \] Now, calculate the resistance: \[ R = \frac{50 \times 10^{-8} \times 120}{3.14159 \times 10^{-6}} = 57.32 \, \Omega Show more…

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A heating coil is made up by winding the nichrome wire of radius r = 1.00 mm and length L = 120 m. If the voltage of 120 V is applied across the coil, what power is dissipated in it? (The resistivity of nichrome is 1.50x10⁻⁶ Ω · m). If the voltage is kept the same, which of the following statements is (are) correct: A. If the wire were longer, the power would be greater; B. If the wire were longer, the power would be lesser; C. If the radius of the wire were larger, the power would be lesser; D. If the radius of the wire were larger, the power would be greater; E. A and C; F. B and D.

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