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physics
quiz
Question | Answer |
---|---|
1.the element of electric heater is made of | nichrome |
2.when the water is heated from 0 c to 100 c ,the volume of water | first decrease and then increase |
3.one mega watt houris equal to | 3.6 *10^9 joule |
4.at what temperature is the temp on celuius and fahrenheit scales equals | -40c |
5.the peroid of revolution round the sun is maximum by which among the following planets | mars |
6.einstein got the nobel price for | photoelectric effect |
7.galvanometer is converted into voltmeter using | high resistance in series |
8.gas laws was given by | boyle |
9.kilowatt hour is unit of | power |
10.ozone layer is protects from us from | uv rays |
11.fire in the diesel engine is produces by which of the following | compression |
12.which of these best conducter of the electricity | silver |
13). Which among the following order of decreasing wavelengths of electromagnetic waves is correct? | I) Radio waves II) Infrared rays III) Visible Light IV) X-Rays |
14). Ampere-hour is the unit of which among the following? | Amount of charge |
15). Who discovered X-Rays? | Roentgen |
16) Which among the following are primary colors? | Red, Green, Blue |
17) At what temperature will the density of water be maximum? | 4 deg Celusis |
18) Persistence of vision is the principle behind? | Cinema |
19) Which metal is commonly used for making an electromagnet? | Iron |
20) Light from the laser is________. | Monochromatic |
21) Choke is used to_______. | a) Reduce the current in AC circuit |
22) In a standing wave the distance between a node and adjacent anti node is______. | λ / 4 |
23) A telescope and microscope differ in that______ | Telescope has objective of large focal length and eyepiece of smaller focal lengths |
24) The weight of a body is______. | Maximum at the poles |
25) At what temperature a body will not radiate any heatenergy? | -273 C |
26) Electromagnetic spectrum consists of the following radiations -I. X-rays II. Gamma rays III. Ultraviolet radiations IV. Infrared radiations Choose the correct order of code in the increasing order of their frequency: | IR,UV,X RAYS ,GAMMA |