Which of the Millikan’s method is used for the determination of charge?
Millikan oil-drop experiment is used for determining the electron charge of an electron. It was first performed by the Robert... View Article
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Observation 1: Try to stop a ball coming towards you,so as to save a boundary, by applying a force of some magnitude in the opposite direction of the motion of ball. Observation 2: In this case apply the force of same magnitude but in same direction of the motion of the ball. In observation 1 boy saves a boundary by applying a force opposite to the direction of motion but in observation 2, the change in direction of force cost the team 4 runs as the change in direction of force pushed the ball further to the boundary. So, the change in effect of a force can be experienced by a change in it’s direction as well as magnitude. The above statement is :-
In the above two observations it is clear that the change in direction of force in the second observation made... View Article
Arrange the modes of transport from earliest mode to new ones?
Roadways was the earliest mode of transport.
What is impulse equal to?
Solution: Impulse is the change in linear momentum and it is a vector quantity. Impulse is the measure of total... View Article
How cyclones are formed in nature?
Cyclone is caused by atmospheric disturbances around a low-pressure area and is usually accompanied by violent storms and severe weather... View Article
A ray of light moves from a rare medium to a dense medium as shown in the diagram below. The ray or rays which represents the partially reflected ray is:
Ray 1 is incident ray, ray 3 is the refracted ray and ray 2 is the partially reflected ray.
What is the subjective property of sound related to its Frequency
Pitch. The sensation of frequencies is commonly referred to as the pitch of a sound. A high pitch sound corresponds... View Article
Two advantages of using a right-angled prism as a reflector, rather than a plane
A total reflecting prism is a right-angled prism made of glass with other two angles each equal to 45 degrees.... View Article
The angle between force and displacement for i) Minimum Work and ii) Maximum Work should be
Minimum work Maximum work The angle between force and displacement should be θ = 90° for minimum work. The angle... View Article
For a step-up transformer______________
Answer: For a step-up transformer, the number of turns in the secondary coil is more than that in the primary coil... View Article
Which of the following statements about the mass and weight of an object is false?
Mass is a measure of the amount of matter present in an object and therefore, it is always constant. However,... View Article
State and explain the law of inertia.
Law of Inertia states that a body in a state of rest or uniform motion remains in the same state until... View Article
Change in effect of a force can be experienced in which of the following cases?
Let us consider an example of throwing a stone. Magnitude of force applied in throwing the stone decides how far... View Article
Name a safety device which is used to limit the current in an electrical circuit. The use of this device safeguards the circuit and the appliances connected in that circuit from being damaged
Fuse wire is a safety device which is used to limit the current in an electrical circuit. Fuse wire is... View Article
Calculate the EMF of the given circuit
Consider a circuit with a potential difference of 5 V, with a current of 2 A flowing and the internal... View Article
The interaction between earth and moon which keeps the moon revolving around earth can be named as a
The interaction between us and earth which binds us together is the force of gravity. Force of gravity or gravitational... View Article
Velocity of an object can be changed by altering
Velocity is a vector quantity. Therefore, change in any of the direction or magnitude or both would result in a... View Article
The change of state of motion of an object can be described as
When a volleyball player smashes a ball, he changes the speed as well as direction of the ball. This is... View Article
Suppose you are assigned to stop a block which is moving eastwards, a force of some magnitude is surely required to stop it. What could be the best possible direction of a force to stop that moving block from motion at the earliest?
Answer: Since the block is moving eastwards, so a force of certain magnitude acting westwards would be the best possible... View Article
The slope of a straight line graph gives the:
The slope of a straight line graph gives the rate of change of quantity taken on y-axis with the quantity... View Article
