Physics-Objective Related Question Answers
401. Melting point of Ice is?
0°C
402. When liquid boils and changes itself into vapour at standard atmospheric pressure is called?
Boiling point
403. When pressure increases boiling point?
Increases
404. Boiling point of water?
100°C
405. Water inside a pressure cooker boils at a 'temperature of?
120°C
406. Sublimation is the process of conversion of a solid directly into?
Vapour eg: camphor
407. Sublimation occurs when boiling point is less than?
Melting point
408. The process of conversion of liquid into vapour at any temperature?
Evaporation
409. Rate of evaporation increases with increase in temperature, surface area and decrease in?
Pressure
410. While sweating under a fan we feel cool because of?
Evaporation
411. A perfectly black body absorbs all types of?
Heat radiations
412. Absorption power of perfectly black body is?
1
413. Device used to measure the temperature of Sun?
Pyroheliometer
414. Study of high temperature?
Pyrology
415. The radiation emitted from a black body is called?
Black body radiation
416. The rate of flow of charge through a conductor per second is called?
Current
417. SI unit is of current?
Ampere (A)
418. Electric charge was first observed in a substance called?
Amber
419. Unit of electric charge?
Coulomb
420. 1 coulomb (c) =?
6.24 X 1018 electrons
421. Charge of an electron =..?
1.6 x 10^-19C
422. The region which surrounds the electrically charged particles?
Electric field
423. The term electricity is coined by?
Gilbert
424. Law of electrolysis were formulated by?
Michael Faraday
425. The process of splitting up of a chemical substance when an electric current flows through it?
Electrolysis
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