Physics 10 Chapter 14 - Current and Electricity - 18

Physics 10 Chapter 14 - Current and Electricity - 18

1. Which of the following statement is CORRECT about diamond?

a) Diamond does not conduct heat
b) Diamond conducts electricity
c) Diamond is an insulator
d) Diamond does not conduct electricity

2. Which of the following statement is CORRECT about diamond?

a) Diamond conducts electricity
b) Diamond does not conducts heat
c) Diamond conducts heat
d) Diamond is an insulator

3. Why diamond does not conduct electricity?

a) Because it has free protons
b) Because it has free electrons
c) Because its particles are very firmly bonded together
d) Because it has no free protons

4. How many times diamond is good at conducting heat as compared to copper?

a) Two or three times
b) Seven or eight times
c) Eight or nine times
d) Four or five times

5. Which of the following is an example of conductor?

a) Copper
b) Wood
c) Glass
d) Rubber

6. In which motion, free electrons in metal like copper move?

a) Brownian motion
b) Circular motion
c) Rotatory motion
d) Random motion

7. Why do we always use metal wires for conduction of electricity?

a) (b) Because they are good conductors of electricity
b) (c) Because they offer less resistance to the flow of current
c) (a) Both b and c
d) (d) Because they offer great resistance to the flow of current

8. In which motion, free electrons in metal like silver move?

a) Random motion
b) Circular motion
c) Rotatory motion
d) Brownian motion

9. Which of the following statement is true about relationship between resistance of conductors and temperature?

a) Resistance of conductor decrease with increase in temperature
b) Resistance of conductor decrease with decrease in temperature
c) Resistance of conductor increase with increase in temperature
d) Resistance of conductor increase with decrease in temperature

10. Which of the following is an example of conductor?

a) Rubber
b) Silver
c) Wood
d) Glass

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