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The Circumference Of A Circle Is Measured As 56 Cm With An Error 0 02 Cm The Percentage Error In Its Area Is

1) 1/7 2) 1/28 3) 1/14 4) 1/56 Solution: (3) 1 / 14 Let r = radius, C – circumference,... View Article

1) 70 π cm2 / s 2) 70 cm2 / s 3) 80 π cm2 / s 4) 80 cm2... View Article

The vapour pressure is the pressure of the vapour above the sample liquid in a closed container. The vapour pressure... View Article

The energy is stored in the form of potential energy in a compressed string. The potential energy stored by the... View Article

The statement of the first law of thermodynamics was given by Rudolf Clausius in the year 1850. According to the... View Article

The minimum energy needed for photo-emission of the electrons is called work function. The work function depends on the material.... View Article

Electric current is due to the flow of electrons from the negative terminal to the positive terminal. While conventional current... View Article

Inertia is the tendency of an object to continue in the state of rest or of uniform motion. The object... View Article

Distance divided by time is the rate of change of position or speed on the object. Speed is a scalar... View Article

In an open system, the pressure is called atmospheric pressure. When the atmospheric pressure is low then the vapour pressure... View Article

Gravity is not centrifugal force. The direction of gravity is opposite to that of centrifugal force. The gravitational force pulls... View Article

The latent heat of vaporization of water means the amount of heat required to break the intermolecular forces and convert... View Article

The basic difference between the Compton effect and the photoelectric effect, the Compton effect occurs on the free electrons while... View Article

The significance of the first law of thermodynamics is listed below It gives the relationship between heat and work. It... View Article

There is no change in the inertia when the velocity is doubled. Inertia is dependent only on the mass of... View Article

A concave lens is thinner in the middle and broader at the ends. The concave lens diverges or bends the... View Article

According to Boyle’s law, at a constant temperature, the volume and pressure are inversely related. When the volume decreases the... View Article

In the year 1850, Rudolf Clausius and William Thomson (Kelvin) stated the first law of thermodynamics and the second law... View Article

Hooke’s law is written as F=- kx. Here, k is the spring constant F is the force X is the... View Article

According to Gauss’s theorem, the total flux through a hypothetical closed surface is always equal to (1/ε0) times the net... View Article