Q1. The temperature coefficient of resistance of a conductor with an increase in temperature.
C. remains the same
D. becomes negative
Q2. The temperature coefficient of resistance of insulators is
Q3. The temperature coefficient of resistance of eureka is
C. almost zero
Q4. If the value of a0 a conductor is 1/234 per oC, then the value of a18 is
A. 1/218 per oC
B. 1/272 per oC
C. 1/273 per oC
Q5. If the value of a25 a conductor is 1/255 per oC, then the value of a20 is
A. 1/300 per oC
B. 1/230 per oC
C. 1/260 per oC
Q6. If the value of a25 of a conductor is 1/230 per oC, then the value of a0 is
A. 1/150 per oC
B. 1/280 per oC
C. 1/230 per oC
Q7. Ohm’s law cannot be applied to which material?
C. Silicon carbide
Q8. What is the practical unit of electrical energy?
Q9. A 200-watt lamp working for 24 hours will consume approximately units.
Q10. The hot resistance of an incandescent lamp is about its cold resistance.
A. 10 times
B. 100 times
C. 5 times
D. 50 times