Related Questions

An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
A Resistance
B Arc
C Low frequency induction
D None of these
__________ furnace is not an electric furnace.
A Arc
B Induction
C Pot
D Resistance
Our skin, when exposed to excess sunlight, becomes dark. This is because of our skin pigments called
A flavoxanthin
B melanin
C carotene
D Xanthophyll
'Stress-induced amnesia strikes the patient apparently without warning and the memory loss can be as complete as is induced by physical trauma.' which correction should be made to this sentence?
A replace 'strikes' with 'contracts'
B replace 'is' with 'that'
C remove 'apparently'
D change 'by' to 'in'
According to Fleming's right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of
A Motion of conductor
B Lines of force
C Either of the above
D None of the above
The stress induced in a body, when suddenly loaded, is _________ the stress induced when the same load is applied gradually.
A Equal to
B One-half
C Twice
D Four times
Heat in a conductor is produced on the passage of electric current due to
A reactance
B capacitance
C impedance
D resistance
Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
A Graphite powder
B Thoria
C Zircon powder
D Beryllium
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
Skin effect occurs when a conductor carries current at _________ frequencies.
A Very low
B Low
C Medium
D High

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