Physics
Two sound waves X and Y have the same amplitude and the same wave pattern but their frequencies are 60 Hz and 120 Hz respectively, then
- X will be shriller and Y will be grave
- X will be grave and Y will be shriller
- X will differ in quality than Y
- X is louder than Y
Related Questions
A convex lens has focal length 12 cm with an object at a distance of 20 cm in front of the lens. He obtains a blurred image on the screen placed at a distance of 23 cm in front of the lens. In order to obtain the clear image, he has to move the screen
- towards the lens.
- away from the lens.
- to a position very far away from the lens.
- either towards or away from the lens.
Assertion (A) : Infrared radiations travel long distance through a dense fog and mist.
Reason (R) : Infrared radiations undergo minimal scattering in earth's atmosphere.
- both A and R are true and R is the correct explanation of A.
- both A and R are True and R is not the correct explanation of А.
- assertion is false but reason is true.
- assertion is true but reason is false.
The graph of voltage vs current for four different materials is shown below.
Which of these four materials would be used for making filament of a bulb?
- Q
- S
- P
- R
According to the old convention, the colour of the earth wire is :
- black
- green
- yellow
- red