Question

7. Image formed by a plane mirror is __________.

(a) Virtual, behind the mirror and enlarged.

(b) Virtual, behind the mirror and of the same size as the object.

(c) Real at the surface of the mirror and enlarged.

(d) Real, behind the mirror and of the same size as the object.

8. Which of the following is NOT a planet of the sun?

(a) Sirius (b) Mercury (c) Saturn (d) Earth

9. Sound can travel through __________.

(a) Gases only (b) solids only (c) liquids only (d) solids, liquids and gases

10. Voice of which of the following is likely to have a minimum frequency?

(a) Baby girl (b) Baby boy (c) A man (d) A woman

11. When a glass rod is rubbed with a piece of silk cloth the rod __________.

(a) And the cloth both acquires positive charge.

(b) Becomes positively charged while the cloth has a negative charge.

(c) and the cloth both acquire negative charge.

(d) Becomes negatively charged while the cloth has a positive charge.

12. Phases of the moon occur because ___________.

(a) We can see only that part of the moon which reflects light towards us.

(b) Our distance from the moon keeps changing.

(c) The shadow of the Earth covers only a part of the moon’s surface.

(d) The thickness of the moon’s atmosphere is not constant.

13. Noise pollution is harmful for _______.

(a) Human (b) cat (c) bird (d) all of the above

14. Force is a ________.

(a) Pull (b) push (c) pull & push both (d) none of the above

15. Magnetic force is _______.​

Answer 1

Answer:

virtual option a

all of the above

Answer 2

Answer:

7.a. is the answer

8.a. is the answer

9.three are the correct

10.A and b are correct

11.gets charged

12.c. is the correct one

13. all the above

14.d.none of these

15.magnetic force