D.C Basic and network and electromagnetic theory. Part – 7

60. A field of force can exist only between –

A. Two molecules

B. Two ions

C. Two atoms

D. Two metal particles

61. Which of the following is/are active element?

A. Voltage source

B. Current source

C. Both            

D. None of these

62. The units of capacitance are-

A. Volts/coulomb

B. Coulombs/volt

C. Ohms

D. henry/Wb

63. Which of the following are passive elements?

A. Resistor

B. Bulb

C. Both

D. None of the above

64. Electric field intensity is a quantity

A. Scalar

B. Vector

C. Both a and b

D. None of the above

65. Power dissipation of ideal inductor is

A. Maximum

B. Zero

C. Minimum

D. A finite value

66. Permittivity is expressed in

A. Farad/sqm

B. Farad/meter

C. Weber/meter

D. Weber/sqm

67. Which of the following circuit elements will oppose the change in circuit current?

A. capacitance

B. inductance

C. resistance

D. all of the above

68. The S.I. unit of power is-

A. Henry

B. coulomb

C. watt

D. watt hour

69. Capacitor does not allow the sudden change of

A. Voltage

B. Current

C. Power

D. None of the above

70. Out of the following which is an insulating material?

A. Copper

B. Gold

C. Silver

D. Paper