Question
Which property of a wave is related to its
frequency? ÂSolution
The energy of a wave is directly proportional to its frequency.  The higher the frequency, the higher the energy.  This is true for electromagnetic waves such as light.  Energy E is given by the formula E = h × f, where h is Planck's constant and f is frequency.
A rod PQ of length 0.6 m moves on smooth rails with speed 3 m/s in a magnetic field B = 0.5 T. The rails form a closed circuit with 4 Ω resistance. Fin...
The group velocity of matter waves associated with a moving particle is:
Which of the following is an example of a non-renewable source of energy? Â
Two bodies of masses m and 4m are separated by a distance d. Where will the gravitational field be zero along the line joining them?
Two blocks of masses 2 kg and 4 kg are connected by a light spring (k = 300 N/m) and placed on a smooth horizontal surface. The spring is compressed by ...
The point where the total mass of a body is considered to be concentrated is known as what?
What is the escape velocity from Earth? Â
What happens to the wavelength of light when it passes from a medium of higher refractive index to a medium of lower refractive index? Â
Which of the following is a reason for excessive current in electrical circuits?
I. Direct touching of wires
II. Connection of many d...
Which law explains why it is difficult to hammer a nail into a freely suspended wooden frame?
