When the permanent magnet becomes too weak find a strong magnet and stroke it with the stronger magnet. The electrons in the weak permanent... View Article
When the ferromagnetic substance is heated it loses its magnetic properties and becomes paramagnetic above a certain temperature. The temperature... View Article
The range of the ammeter can be increased by connecting a suitable low resistance parallel to the ammeter. This reduces the effective resistance.... View Article
According to Einstein’s theory of relativity and based on all the experiments till date there is nothing in the real world that travels faster... View Article
The intensity of sound at a given point in a medium is the average rate of transfer of energy per unit area, the area being perpendicular to the... View Article
Maintaining a constant frequency is very important since fluctuating frequency can damage the equipment. The equipment in our houses, offices,... View Article
With all the other factors being equal, if the number of turns of the wire is increased then the inductance is increased and inductance is... View Article
The main disadvantage of a heat engine is the limitation of efficiency. Heat engine has the advantage that any forms of energy can be easily... View Article
The formula for thermal efficiency is Õ² = 1 - (T2/T1) T2 is sink temperature T1 is the source temperature Therefore the thermal efficiency... View Article
The maximum forward voltage is the amount of voltage required to get the current to flow across the junction of the diode. It is important to... View Article
When the LED is forward biased the electrons from the conduction band of the semiconductor will combine with the holes in the valence band and... View Article
When the positive terminal of the diode is connected to the n-side and the negative terminal to the p-side the pn junction is said to be reverse... View Article
Bulk modulus is a measure of the resistance of solids or liquids to changes in their volume. If the force is applied normally and uniformly over... View Article
Interference fringe is the bright or dark band of light caused due to the superposition of two or more light waves. The fringe width is defined... View Article
The intensity of sound is measured in watt per square metre (Wm-2). The faintest sound that a human ear can detect at a frequency of 1000 Hz... View Article
