Question

Multiple Choice Questions
1. At the time of short circuit, the current in the circuit:-

(a) Reduces substantially

b) does not change

2. The filament of an electric bulb is made of a thin wire of:

(a) Copper

(b)Aluminium

(c)Nichrome

(d)Tungsten

3. When electric current path is passed through the filament of a bulb, it gives off:-

(A) Sound

(b)Heat

(c)Magnetism

(d)Light

(A) A&B

(B)B&C

(C)B&D

(D)only D

4. An electric fuse works on the:

(a) Chemical effect of current

(b) Magnetic effect of current

(c) Lighting effect of current

(d) Heating effect of current

5. The most suitable material for making the core of an electromagnet is:

(a) iron

(b)Brass

(c) aluminum

(d)steel

6. Nichrome wire is used in:-

(a) CFL

(b)electric fuse

(c) hair dryer

(d) MCB

7. The sound produced in a door bell is due to the:-

(a) Chemical effect of current

(b) heating effect of current

(c) Magnetic effect of current

(d) sound effect of current

8. Which of the following characteristic is not suitable for a fuse wire?

(a) Thick and short

(b) thin and short

(c) Higher resistance than rest of wining

(d)low melting point

9. An MCB which cuts off the electricity supply in domestic circuit in case of shorts circuiting or overloading works on the :-

(a) Chemical effect of current

(b)magnetic effect of current

(c) Lighting effect of current

(d) Heating effect of current

10. Which of the following does not work on the heating effect of current?

(a) electric bulb

(b)electric fuse

(c) Miniature circuit breaker

(d) Immersion rod​

Answer 1

Answer:

1. increases

2.Tungsten

3.b and d

4.heating effect

5.iron

6.hair dryer

7.magnetic effect of ec

8.thick and short

9.magnetic effect of ec

10.MCb