Related Questions

Which of the following is a good conductor of heat but bad conductor of electricity ?
A Asbestos
B Celluloid
C Straw Board
D Mica
Which of the following is a good conductor of heat but a bad conductor of electricity ?
A Celluloid
B Rubber
C Asbestos
D Mica
Which of the following is a good conductor of heat but a bad conductor of electricity?
A Celluloid
B Rubber
C Asbestos
D Mica
In electric press, mica is used because it is _______ conductor of heat but/and________ conductor of electricity.
A bad, good
B bad, bad
C good, bad
D good, good
which of the following is not a conductor of electricity ?
A Graphite
B Glass
C Wet Bamboo
D Platinum
Which of the following is not a conductor of electricity?
A Ceramic
B aluminium
C Tungsten
D Nickel
Which of the following is an advantage of stranded conductor over equivalent single conductor ?
A Less liability to kink
B Greater flexibility
C Less liability to break
D All of the above
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon
A The value of current
B The weight of the conductor
C The direction of the conductor
D None of the above
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by
A Blv
B Blv2
C Bl2v
D Bl2v2
The weight of an aluminium conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is
A 50 %
B 60 %
C 100 %
D 150 %

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