Which among the following determines the pitch of a sound?
1). Amplitude
2). Frequency
3). Loudness
4). Wavelength
2. A boat will submerge when it displaces water equal to its own
3. 1 WH =
4. Which of the following statements is true when we see ''rainbow' ?
5. The domain theory of magnetism applies to
7. The oil in the wick of lamp rises due to
8. Magnetism in materials is due to
9. _____ mirror is used in the headlights of cars.
10. What is the name of the device used to convert alternating current into direct current ?