Physics - Study Mode
[#891] A fountain pen works on the principle of
Correct Answer
(B) Capillary action
Explanation
Solution: A fountain pen is a nib pen that, unlike its predecessor, the dip pen, contains an internal reservoir of liquid ink. The pen draws ink from the reservoir through a feed to the nib and deposits it on paper via a combination of gravity and capillary action.
[#892] A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.
Correct Answer
(A) The mercury level starts rising
Explanation
Solution: As the pump removes the air from the bell jar the pressure obviously reduces around the barometer. The reduction in pressure around the barometer leads it to expand. As the pump removes air from the jar, the mercury level rises.
[#893] The temperature at which water boils depends mainly on
Correct Answer
(A) Air Pressure
Explanation
Solution: The temperature at which water boils depends mainly on air pressure.
[#894] Air pressure is measured in which of the following units?
Correct Answer
(D) Pascal
Explanation
Solution: Air pressure is measured in Pascal.
[#895] According to Rutherford's atomic model, the electrons inside an atom are
Correct Answer
(B) Not Stationary
Explanation
Solution: According to Rutherford's atomic model, the electrons inside an atom are not stationary.