A liquid has N permanent dipoles ?p per unit volume and has been subjected to dc

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Question
A liquid has N permanent dipoles ?_p per unit volume and has been subjected to dc field for a long time such that orientation polarization is P₀. At t = 0, the field is suddenly removed, then polarization
Options
A. will remain constant at P₀
B. will become zero at t = 0
C. will delay to zero with a time constant
D. either b or c

Correct Answer

will delay to zero with a time constant

More questions

2. Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?
Options
A. Variable selectivity
B. Variable sensitivity
C. Double conversion
D. Squelch

8. The power dissipation in a transistor is the product of
Options
A. emitter current and emitter to base voltage
B. emitter current and collector to emitter voltage
C. collector current and collector to emitter voltage
D. none of the above

9. Match the following:

	List I (F.T and F.S)		List II (Properties)
A.	Fourier Series	1.	Discrete, Periodic
B.	Fourier Transform	2.	Continuous, Periodic
C.	Discrete Time Fourier	3.	Discrete aperiodic
D.	Discrete Fourier Transform	4.	Continuous, aperiodic

Options
A. A-3, B-4, C-2, D-1
B. A-1, B-2, C-4, D-3
C. A-3, B-2, C-4, D-1
D. A-1, B-4, C-2, D-3

10. Consider the following statements
1. An iron cored choke is non linear and passive device.
2. A carbon resistor kept in sunlight is a time invariant and passive device.
3. A dry cell is a time varying and active device.
4. An air capacitor is time invariant and passive device.
Of these statements
Options
A. 1, 2, 3 and 4 are correct
B. 1, 2, 3 are correct
C. 1, 2, 4 are correct
D. 2 and 4 are correct

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