Instrument for measuring wind velocity is called
1). Coulombmeter
2). Anemometer
3). Cyanometer
4). Chronometer
1. Planets are
2. The Laser is a beam of radiations which are
3. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
4. For a ray of light to suffer total internal reflection it has to pass from :
5. Amount of water vapour in the atmosphere is measured in terms of
6. The length of the pendulum is doubled and the mass of its bob is halved. Its time sperod would
7. Convex mirror is generally used in _____.
8. Which is the coldest planet?
9. Which statement best describes an igneous intrusion?
10. Which one of the following has the highest value of specific heat?