By what factor is the self-inductance of a solenoid changed if its length is doubled and its number of coil turns is tripled?
a. 2/9
c. 3/4
b. 9/2
d. 4/3
[Ques. 2] The wave-related quantity algebraically equivalent to 1/f is:
a.
c. A
b. T
d.
[Ques. 3] By what factor is the self-inductance of a solenoid changed if only its cross-sectional area, A, is doubled?
a. 1/2
c. 2
b. 4
d. 8
[Ques. 4] Which of the following media cannot support longitudinal waves?
a. aluminum
c. string
b. air
d. water
[Ques. 5] By what factor is the self-inductance of a solenoid changed if only its number of coil turns, N, is doubled?
a. 8
c. 4
b. 1/2
d. 2
[Ques. 6] A wave produced by a simple harmonic driving force is called a _____ wave.
a. disturbance
c. transverse
b. periodic
d. longitudinal
[Ques. 7] What is the self-inductance in a coil that experiences a 3.0-V induced emf when the current is changing at a rate of 37 A/s?
a. 81 mH
c. 27 mH
b. 37 mH
d. 45 mH
[Ques. 8] As a gust of wind blows across a field of grain, a wave can be seen to move across the field as the tops of the plants sway back and forth. This wave is a:
a. transverse wave.
c. polarized wave.
b. longitudinal wave.
d. interference of waves.
[Ques. 9] A coil with a self-inductance of 0.75 mH experiences a constant current buildup from zero to 15 A in 0.25 s. What is the induced emf during this interval?
a. 0.045 V
c. 0.030 V
b. 0.47 V
d. 0.019 V
[Ques. 10] If the torsion constant of the suspension fiber in the Cavendish experiment were doubled, what would happen to the frequency of oscillation? The last two answers have been rounded to 2 significant figures.
a. It would double.
c. It would increase by a factor of 1.4.
b. It would halve.
d. It would decrease by a factor of 0.71.
Quick Reply
