CURRENT ELECTRICITY PART 2

CURRENT ELECTRICITY PART 2

11. Electric pressure is also called 

a.resistance

b. power

c. voltage

d. energy

12. The substance which have a large number of free electrons and offer a low resistance are called

a.insulator 

b.inductor 

c.semiconductor 

d.conductors

13. Out of the following which is not a poor conductor ?

a.copper

b. cast iron

c. carbon 

d.tungsten

14. Out of the following which is an insulating material

a.copper 

b.gold 

c.silver

d. paper

15.The property of a conductor due to which it passes current is called

a.ressistant 

b.inductance

c.conductance

d.reluctance

16. Conductance is reciprocal of 

a.resistance

b.inductance 

c.reluctance 

d.capacitance

17. The resistance of a conductor varies inversely as 

a.length

b.area of cross section

c.temperature

d.resistivity

18. With rise in temperature the resistance of pure metals 

a.increases 

b.decreases 

c.first increases and then decreases

d.remains constant

19. With rise in temperature the resistance of semiconductors

a.decreases 

b.increases

c.first increases and decreases

d remains constant

20.The resistance of a copper wire 200 metre long is 21 ohm if the thickness (diameter) is 0.44 mm its specific resistance is around

a.1.2 × 10^-8 ohm-m

b.1.4 × 10^-8 ohm-m

c.1.6 × 10^-8 ohm-m

d.1.8 × 10^-8 oh-m

Answer:-11.c  12.d 13.a 14.d  15.c  16.a  17.b  18.a 19.a 20.c