Correct Answer:- Option-D
Question78:-An ideal insulating material should have low

A:-insulation reistance

B:-dielectric strength

C:-dielectric loss angle

D:-mechanical strength

Correct Answer:- Option-C
Question79:-Two wire A and B of the same material and length | and 21 have radius rand 2r respectively, the ratio of their
specific resistance will be

D:-1:8
Correct Answer:- Option-A

QuestionB0:-Across the surface of a charged conductor, the electric
A:-the field is continous

B:-potential is discontinuous
C:-field is discontinuous
D:-none of the above
Correct Answer:- Option-C
Question81:-In magnetic circuits, an air gap is usually inserted so as to
A:-increase in mmf
B:-prevent saturation
C:-increase in flux
D:-the increase in inductance
Correct Answer:- Option-B
Question82:-An Electromagnetic field is radiated from a
A:-stationary point charge
B:-a capacitor with the DC voltage
C:-a conductor camying in a DC current
D:-an oscillating dipole
Correct Answer:- Option-D
Question83:-In a series RLC circuit, the maximum voltage across the capacitor occurs at a frequency
A:-double the resonant frequency
B:-below the resonant frequency
C:-1.414 times the resonant frequency
D:-equal to resonant frequency
Correct Answer:- Option-B
Question84:-Wave winding is employed in a DC Machine of
A:-high current and low voltage rating
B:-low current and high voltage rating
C:-high current and high voltage rating
D:-low current and voltage rating
Correct Answer:- Option-B
Question85:-The flux in transformer core
A:-increases with load
B:-decreases with load
C:-remains constant 178506೮1೪6 ೦81026
D:-none of the above
Correct Answer:- Option-C
Question86:-In cylindrical Rotor ............ portion of the rotor is wound
A:-one third
B:-two third
C:-one half
D:-whole
Correct Answer:- Option-B
Question87:-Protection by fuses is generally not used beyond
A:-200 A
B:-50 A