Page 59 - CHAPTER-1 (Electricity)

CHAPTER 1

ELECTRICITY

29. An electric bulb is connected to a 220V generator. The current is

0.50 A. What is the power of the bulb?

(a) 440 W (b) 110 W

(c) 55 W (d) 0.0023 W

30. 1 kWh = ……….. J

-6
6
(a) 3.6 × 10 J (b) 13.6 × 10 J
-6
(c) 3.6 × 10 J (d) 13.6 × 10 J
6
31. Which of the following gases are filled in electric bulbs?

(a) Helium and Neon (b) Neon and Argon

(c) Argon and Hydrogen (d) Argon and Nitrogen

32. What is the value of electric current in the following circuit ?

2 2
(a) 1.5 A (b) 0.5 A

I 2
(c) 2.5 A (d) none of these
2V
33. Five identical resistance coils are connected in the network as

shown in fig. and the resistance measured between A and B is 1W.

Then the individual coils must have a resistance of :-

1
(a) 1 Ω (b) Ω
A B 4
4
7
(c) Ω (d) Ω
4 7
34. Which of the following networks yields maximum effective

resistance between A and B ?

2 2 2 2
A B
(a) 2 (b) A 2 B

2 2

2
A B
(C) A 2 2 B (D) 2

57