**Q1. The temperature coefficient of resistance of a conductor with an increase in temperature.**

A. increases

**B. decreases**

C. remains the same

D. becomes negative

**Q2. The temperature coefficient of resistance of insulators is**

A. zero

**B. negative**

C. positive

D. infinite

**Q3. The temperature coefficient of resistance of eureka is**

A. positive

B. negative

**C. almost zero**

D. infinite

**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?**

A. Copper

B. Silver

**C. Silicon carbide**

D. Aluminum

**Q8. What is the practical unit of electrical energy?**

A. Watt

**B. Kilowatt-hour**

C. Kilowatt-second

D. Megawat-hour

**Q9. A 200-watt lamp working for 24 hours will consume approximately units.**

A. 50

**B. 5**

C. 24

D. 0.5

**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