Question 22 18) A wire with a current of 2.8A is at an angle of 36degrees relative to a magnetic field of 0.88 T. Find theforce exerted on a 2.25 m length of wire?19) Waves on a particular string travel with a speed of16 m/s. By what factor should the tension in the stringbe changed to produce waves with a speed of 32 m/s?20) The intensity level of sound of a truck is 92 deci-bels. What is the intensity of this sound? Io:10-1221) A train moving with a speed of 32 m/s sounds a140 Hz horn. What frequency is heard by an observerstanding near the tracks as the train approached?22) Two sources emit waves that are in phase with eachother. What is the longest wavelength that will giveconstructive interference at an observation point of 161m from one source and 295 m from another source?

Distances from the source l1 = 161 m l2 = 295 m

22) Two sources emit waves that are in phase with each other. What is the longest wavelength that will give constructive interference at an observation point of 161 Im from one source and 295 m from another source?

22) Two sources emit waves that are in phase with each other. What is the longest wavelength that will give constructive interference at an observation point of 161 Im from one source and 295 m from another source?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 51PE: Create Your Own Problem Consider electromagnetic fields produced by high voltage power lines....

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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

Question 22

18) A wire with a current of 2.8A is at an angle of 36
degrees relative to a magnetic field of 0.88 T. Find the
force exerted on a 2.25 m length of wire?
19) Waves on a particular string travel with a speed of
16 m/s. By what factor should the tension in the string
be changed to produce waves with a speed of 32 m/s?
20) The intensity level of sound of a truck is 92 deci-
bels. What is the intensity of this sound? Io:
10-12
21) A train moving with a speed of 32 m/s sounds a
140 Hz horn. What frequency is heard by an observer
standing near the tracks as the train approached?
22) Two sources emit waves that are in phase with each
other. What is the longest wavelength that will give
constructive interference at an observation point of 161
m from one source and 295 m from another source?

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