Temperature co-efficient of resistance is expressed in terms of___________? A. ohms/°C B. mhos/ohm°C C. ohms/ohm°C D. mhos/°C

A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be_____________? A. 80 m B. 60 m C. 40 mD. 20…

Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be_____________? A.…

Ohm’s law is not applicable to__________? A. semi-conductors B. D. C. circuits C. small resistors D. high currents

Which method can be used for absolute measurement of resistances _______________?A. Lorentz method B. Releigh method C. Ohm’s law method D. Wheatstone bridge method  

Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ___________? A. 3/2 Q B. 6 Q C. 4 Q D. 8/3 Q

Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be_________________? A. 9 times B. 1/9 times C. 1/3 times D. 3 times

International ohm is defined in terms of the resistance of________________? A. a column of mercury B. a cube of carbon C. a cube of copper D. the unit length of wire

A substance whose molecules consist of dissimilar atoms is called____________? A. semi-conductor B. super-conducto C. compound D. insulator

A field of force can exist only between_____________? A. two molecules B. two ions C. two atoms D. two metal particles