Related Questions

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
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
'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
If current in a conductor increases then according to Lenz's law self-induced voltage will
A Aid the increasing current
B Tend to decrease the amount of current
C Produce current opposite to the increasing current
D Aid the applied voltage
As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it
A Lies perpendicular to the magnetic flux
B Lies in a magnetic field
C Cuts magnetic flux
D Moves parallel to the direction of the magnetic field
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 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
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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