Two sources are coherent when they have the same frequency and a constant phase difference. Lasers are examples of coherent sources of light.... View Article
Any Boolean function can be implemented using the combination of the NAND gate. This is called functional completeness. NAND gates with more than... View Article
Free vibration occurs when there is no energy transfer between the vibrating object and the surrounding. In forced vibration, there is a driving... View Article
Yes, frequency changes in damped oscillation. The oscillator continuously gives out energy to the surrounding due to friction and drag force.... View Article
If a path is created disconnecting the power supply for the charges in the capacitor to flow, then the charges will discharge completely. The... View Article
The volume of sound is the loudness of the sound. The loudness of sound is a physiological sensation of the ear of a person. It depends on the... View Article
Ultraviolet rays have a low wavelength, therefore frequency and the energy of the photons is high. Higher energy photons knock out electrons with... View Article
When a DC power supply is connected to an inductor the current levels will remain a constant and voltage difference is not induced. Therefore,... View Article
The electric field is uniform between the parallel plates of a capacitor since the distance between the plates is kept very small compared to the... View Article
The thermal efficiency of a heat engine is the measure of heat energy that gets converted into work. The thermal efficiency is given as the ratio... View Article
Entropy is the measure of the disorder. According to the second law of thermodynamics, the entropy of the universe is increasing. The system... View Article
The photocell is a device that works on the principle of the photoelectric effect. A photocell converts light energy to electric energy. The... View Article
When a torque is applied to an object along an axis it causes rotational motion of the object. The torque, the rotational analogue of force... View Article
The direction of the electric force is opposite to the direction of the electric field for a negatively charged electron. The force acting on the... View Article
The rubbing of objects or friction causes static electricity. This is caused by the movement of the electrons from one object to the other. The... View Article
Yes, the spring constant decreases when there is an increase in temperature. The spring constant is determined using Hooke’s law. The unit of... View Article
The voltmeter is used to measure the potential difference between two points in a circuit. The voltmeter should be placed parallel to the... View Article
