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The force between two charge bodies is called?

The force between two charged bodies is called electrostatic force. Electrostatic forces are attractive or repulsive forces between particles... View Article

Generally the warm ocean currents originate near? (A) Poles (B) Lakes (C) Equator (D) None of these

Answer: (C) Equator... View Article

The rising air bubble in water increases in size. why ?

The pressing factor under a fluid surface fluctuates with depth. On the increase of depth, the pressure also increases. Subsequently, when an air... View Article

A body can be negatively charged by: (a) Giving excess of electrons to it (b) Removing some electrons from it (c) Giving some protons to it (d) Removing some neutrons from it

Electric charges are of two types. Positive charge and negative charge. An object is negatively charged if it gains excess of electrons and... View Article

A block of mass10 kg is moving in x-direction with a constant speed of 10 m/s. It is subjected to a retarding force F=0.1xJ/m during its travel from x=20m to x=30cm. Its final kinetic energy will be : (A) 450J (B) 475J (C)250J (D) 275J

Answer: (B) 475 J Initial K.E. = 1/2 mv2 = 1/2 (10) (10)2 = 500J Retarding force, at x = 20m, F1 = 0.1 x 20 = 2N Retarding force, at x = 30m,... View Article

Define: 1 volt, Potential difference, Ohm’s law in easy language

Ohm's law: Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all... View Article

What is the SI unit of electric charge?

The SI unit of electric charge is coulomb... View Article

State Ohms Law

Answer: Ohm's law states that the potential difference, V, across the ends of a given metallic wire in an electric circuit is directly... View Article

An incompressible liquid flows through a horizontal tube as shown in figure. Then the velocity v of the fluid is:

As per the given diagram: Q = Q1 +Q2 3A = 1.5A + 1.5A.V 1.5A = 1.5A.V V = 1m/s Therefore, the velocity of fluid is 1m/s.... View Article

The ozone layer restricts: (A) Ultraviolet radiation (B) X-rays and gamma rays (C) Infrared radiation (D) Visible light

Answer: (A) Ultraviolet radiation The ozone layer restricts ultraviolet radiation.... View Article

Which mirror is used by a dentist to focus light on tooth of a patient?

A concave mirror is used by the dentist to focus light on the tooth of a patient because it has magnification greater than 1.... View Article

Explain why holes are made in hanging banners and hoardings.

Answer: If banners and hoarding do not have holes in them, then due to air pressure banners and hoardings may tear or fall down. Thus, holes... View Article

Supercharging is the process of: (A) Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere (B) Providing forced cooling air (C) Injecting excess fuel for raising more loads (D) Supplying compressed air to remove combustion products fully

Answer: (A) Supercharging is the process of supplying the intake of an engine with air at a density greater than the density of the surrounding... View Article

How many electrons are there in one coulomb of electricity?

1 Columb of charge contains 6.25 × 1018 electrons.... View Article

Define angle of friction.

The angle between the resultant of frictional force and the normal reaction makes with the normal force is called the angle of friction.... View Article

A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is: (A) Uniform (B) Accelerated (C) Along the circular tracks (D) Retarded

Answer: (B) Accelerated A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is... View Article

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