A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page
The external field decreases to 0.020 T in 12 milliseconds.
(a) What is the magnitude of the change in the external magnetic flux enclosed by the coil?
(b) What is the magnitude of the average voltage induced in the coil as the external flux is changing?
(c) If the coil has a resistance of 4.0 ohms, what is the magnitude of the average current in the coil?
(a) 4.0 × 10-3 T ? m2 (b) 0.57 V (c) 0.14 A
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If the charge carriers are positive instead of negative, what difference will result when measuring the Hall voltage?
A. There is no difference. B. Hall voltages will be double for positive charge carriers. C. Hall voltages will be double for negative charge carriers. D. The polarity of the voltage will be reversed. E. Hall voltages cannot be measured for positive charge carriers.
An ambulance is generating a siren sound at a frequency of 2,000 Hz. The velocity of sound is 345.0 m/s. The observer and the ambulance are traveling toward each other at a velocity of 24.00 m/s. If the ambulance is stationary, what is the frequency of the siren perceived by the observer?
A. 2,640 Hz B. 2,559 Hz C. 2,324 Hz D. 2,139 Hz E. 2,003 Hz
In regard to the Compton scattering experiment with x-rays incident upon a carbon block, as the scattering angle becomes larger, what happens to the magnitude of difference between the incident and scattered wavelengths?
a. increases b. decreases c. remains constant d. difference is maximum at a 45° angle of scatter
Time Dilation: A spaceship enters the solar system moving toward the sun at a constant speed relative to the sun. By its own clock, the time elapsed between the time it crosses the orbit of Jupiter and the time it crosses the orbit of Mars is 50.0 minutes. As measured in the coordinate system of the sun, how long did it take for the spaceship to travel that distance? The radius of the orbit of Jupiter is 778 × 109 m, and that of the orbit of Mars is 228 × 109 m.
A. 30.0 minutes B. 43.6 minutes C. 58.6 minutes D. 69.8 minutes E. 95.8 minutes