According to Newton’s law of universal gravitation, gravity is a force of attraction between any two objects in the universe. It is directly... View Article
Doppler effect is the apparent change in the frequency of light. Doppler effect is used in estimating the speed of distant stars, planets and... View Article
The change in momentum is called impulse. Impulse is given by the product of force and time. If the impulse is high then the change in momentum... View Article
Photoelectric effect could not be explained by classical mechanics because of the following factors In the photoelectric effect, electrons... View Article
Heat can be transmitted either by conduction, convection and radiation. Radiation does not require any medium to transfer energy. One important... View Article
The conclusions of the photoelectric effect are listed below The photoelectric effect is caused when the photons in the light interact with... View Article
The materials commonly used as a dielectric in a capacitor are paper, mica, ceramic, air, plastic film and oxide layers. The capacitor plates are... View Article
The principle of vernier caliper is the alignment of the line segments to get a more accurate measurement. The objects whose length has to be... View Article
Entropy is not a law, it is the measure of the disorder. The second law of thermodynamics is also called the law of entropy. The second law of... View Article
Newton’s second law states that the time rate of change of momentum is directly proportional to the impressed force and takes place in the... View Article
The force acting between two point charges is given by Coulomb’s law. The magnitude of the force between the two charges is directly proportional... View Article
The Doppler shift can be calculated using the formula below f = f0 (v + vr)/( v+vs) Here, f is the observed frequency of the wave in Hertz f0... View Article
In a circular motion, the object just moves in a circle. For example, artificial satellites going around Earth at a constant height. In... View Article
The lenses are of three types based on the curve of the glass on either side of the lens. Concave lens: The centre of the concave lens is... View Article
Latent heat of condensation is equal to the latent heat of vapourization with opposite sign. The latent heat of condensation is always negative... View Article
According to quantum theory, light is in the form of packets of energy called the photons. The energy of the photon is equal to hf. Here, h is... View Article
Momentum is the product of mass and velocity. Momentum is a vector quantity having both direction and magnitude. According to Newton’s second law... View Article
Momentum is not a form of energy. Though, momentum and kinetic energy are concepts related to the motion of the object. Whenever there is a... View Article
a) -i + j - 2k b) 2i - j + 2k c) i - j - 2k d) i + i - 2k Answer: (a) -i + j - 2k Solution: Given, a = j-k and c = i-j-k a x b+c = 0 and... View Article
