Related Questions

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 %
Resistance of an electrical conductor is proportional to its (where, L = length and A = cross-sectional area of the conductor)
A A
B L
C A2
D Both A & B
একটি রোধ থার্মোমিটারের সাহায্যে পানির ত্রৈধবিন্দুর রোধ 6.7 ohm এবং কক্ষ তাপমাত্রায় রোেধ 7.5 ohm পাওয়া যায়। কক্ষের তাপমাত্রা কত হবে? 
A 18.2° C
B 20.8° C
C 32.6°C
D 35.9° C
Ohm's law describes how current is related to voltage and resistance.
A True
B False
Which of the following is a good conductor of heat but bad conductor of electricity ?
A Asbestos
B Celluloid
C Straw Board
D Mica
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
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
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
An uncharged conductor is placed near a charged conductor, then
A the uncharged conductor gets charged by conduction
B the uncharged conductor gets charged by induction and then attracted towards the charging body
C the uncharged conductor is attracted first and then charged by induction
D it remains as such
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

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