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Chapter 32, Problem 1CQ
To determine

a) Instantaneous value of emf

b) If the magnitude of each emf increasing, decreasing or holding constant.

Expert Solution & Answer
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Answer to Problem 1CQ

Solution:

For phasor a.

a) Instantaneous emf = 100 V

b) emf is decreasing.

For phasor b.

a) Instantaneous emf = 60 V

b) emf is decreasing.

For phasor c.

a) Instantaneous emf = 80 V

b) emf is increasing.

Explanation of Solution

Given:

The following figure showing phasors are given.

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition), Chapter 32, Problem 1CQ

Explanation:

From the figure we can find the value of the emf of each of the phasors.

For phasor a

a) The instantaneous value of emf = 100 V

b) The phasor rotates counter clockwise, as phasor a rotates it comes near to the vertical axis and goes away from the horizontal axis, hence the magnitude of emf is decreasing.

For phasor b

a) The instantaneous value of emf = 60 V

b) The phasor rotates counter clockwise, as phasor b rotates it comes near to the vertical axis and goes away from the horizontal axis, hence the magnitude of emf is decreasing.

For phasor c

a) The instantaneous value of emf = 80 V

b) The phasor rotates counter clockwise, as phasor c rotates it comes near to the horizontal axis and goes away from the vertical axis, hence the magnitude of emf is increasing.

Conclusion:

For phasor a: The instantaneous emf is 100 V, and the magnitude is decreasing.

For phasor b: The instantaneous emf is 60 V, and the magnitude is decreasing.

For phasor c: The instantaneous emf is 80 V, and the magnitude is increasing.

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Chapter 32 Solutions

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)

Ch. 32 - Prob. 1EAPCh. 32 - Prob. 2EAPCh. 32 - A 110Hz source of emf has a peak voltage of 50V ....Ch. 32 - Prob. 4EAPCh. 32 - Prob. 5EAPCh. 32 - Prob. 6EAPCh. 32 - Prob. 7EAPCh. 32 - Prob. 8EAPCh. 32 - Prob. 9EAPCh. 32 - Prob. 10EAPCh. 32 - Prob. 11EAPCh. 32 - Prob. 12EAPCh. 32 - Prob. 13EAPCh. 32 - Prob. 14EAPCh. 32 - A high-pass RC filter is connected to an AC source...Ch. 32 - Prob. 16EAPCh. 32 - Prob. 17EAPCh. 32 - A low-pass filter consists of a 100F capacitor in...Ch. 32 - What are VRand VCif the emf frequency in FIGURE...Ch. 32 - A high-pass filter consists of a 1.59F capacitor...Ch. 32 - An electric circuit, whether it’s a simple...Ch. 32 - A 20mH inductor is connected across an AC...Ch. 32 - The peak current through an inductor is 10mA ....Ch. 32 - Prob. 24EAPCh. 32 - Prob. 25EAPCh. 32 - An inductor has a peak current of 330A when the...Ch. 32 - A series RLC circuit has a 200kHz resonance...Ch. 32 - Prob. 28EAPCh. 32 - Prob. 29EAPCh. 32 - A series RLC circuit consists of a 50 resistor, a...Ch. 32 - At what frequency f do a 1.0F capacitor and a 1.0H...Ch. 32 - Prob. 32EAPCh. 32 - Prob. 33EAPCh. 32 - The heating element of a hair drier dissipates...Ch. 32 - A resistor dissipates 2.0W when the rms voltage of...Ch. 32 - 36. For what absolute value of the phase angle...Ch. 32 - The motor of an electric drill draws a 3.5Arms...Ch. 32 - Prob. 38EAPCh. 32 - Prob. 39EAPCh. 32 - Prob. 40EAPCh. 32 - Prob. 41EAPCh. 32 - Prob. 42EAPCh. 32 - Prob. 43EAPCh. 32 - Prob. 44EAPCh. 32 - Prob. 45EAPCh. 32 - Prob. 46EAPCh. 32 - Prob. 47EAPCh. 32 - Prob. 48EAPCh. 32 - Use a phasor diagram to analyze the RL circuit of...Ch. 32 - A series RL circuit is built with a 110 resistor...Ch. 32 - A series RLC circuit consists of a 75 resistor, a...Ch. 32 - Prob. 52EAPCh. 32 - Prob. 53EAPCh. 32 - Prob. 54EAPCh. 32 - Prob. 55EAPCh. 32 - Prob. 56EAPCh. 32 - Prob. 57EAPCh. 32 - Prob. 58EAPCh. 32 - Prob. 59EAPCh. 32 - The tuning circuit in an FM radio receiver is a...Ch. 32 - A television channel is assigned the frequency...Ch. 32 - Prob. 62EAPCh. 32 - Prob. 63EAPCh. 32 - Prob. 64EAPCh. 32 - Prob. 65EAPCh. 32 - Prob. 66EAPCh. 32 - A motor attached to a 120V/60Hz power line draws...Ch. 32 - Prob. 68EAPCh. 32 - Prob. 69EAPCh. 32 - Prob. 70EAPCh. 32 - Prob. 71EAPCh. 32 - Consider the parallel RLC circuit shown in FIGURE...
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