Related Questions

Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.
A No change
B Decrease
C Increase
D Exponential decrease
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 %
What is the answer to this question? The resistance of a few meters of wire conductor in closed electrical circuit is
A Practically zero
B Low
C High
D Very high
Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
A $$\frac{1}{9}$$ times
B 3 times
C 9 times
D Unchanged
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
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be
A Zero
B BLI
C B2LI
D BLI2
The length of a rectangle is twice its breadth . If its length is decreased y 5 cm and breadth is increased by 5 cm , the area of the rectangle is increased by 75 sq. cm . Find the length of the rectangle.
A 20 cm
B 25 cm
C 30 cm
D Try your self
The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
A Lewis-Randall rule
B Statement of Vant-Hoff equation
C Le-Chatelier's principle
D None of these
একটি কণা t = 0 সময়ে স্থির অবস্থা থেকে যাত্রা শুরু করে। কণাটির ওপর প্রযুক্ত লব্ধি বল, সময় t এর সমানুপাতিক। কণাটির গতিশক্তি নিচের কোনটির সমানুপাতিক হবে? (A particle starts from rest at t = 0. The net force acting on the particle is proportional to time t. Its kinetic energy is proportional to which one of the following?)
A t2
B t3
C t
D t4
The area of a squeare is three-fifths the area of a rectangle. the length of the rectangle is 25 cm and its breadth is 10 cm less than its length. What is the perimeter of the square?
A 60cm
B 44cm
C 80cm
D cannot be determined

Next steps