11. A) F  12. A) Sound waves B) Radio waves C) Light waves D) All of them Two charged particles attract each other with

[answerhappygod]

11. A) F

12.
A) Sound waves B) Radio waves C) Light waves D) All of them
Two charged particles attract each other with a force F. If the
charges of both particles are doubled, and also doubled their. The
new attraction force will be
B) 2F C) F/2 D) F/4
Interference is a property of
13. The lowest frequency of visible light is color closed
to
A) Red B) Yellow C) Green D) Blue
14. Which of the following are vector quantities?
(i) Mass (ii) Volume (iii) Displacement (iv) Velocity
A) (i) and (ii) B) (ii) and (iii) C) (iii) and (iv) D) All of
the above
15. Which of the following electromagnetic waves has the longest
wavelength? A) Radio waves B) Infrared C) Ultraviolet D)
Microwaves