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Q. Write the applications of a capacitor.
Applications of capacitors. (i) They are utilized in the ignition system of automobile engines to eliminate sparking. (ii) They are utilized to reduce voltage fluctuations in power supplies and to increase the efficiency of power transmission. (iii) Capacitors are utilized to generate electromagnetic oscillations and in tuning the radio circuits.
State the law of radioactive decay. Show that radioactive decay is exponential in nature. Does the activity of a radioactive element depend on external physical conditions? La
Noise: An undesirable and unpleasant sound that makes harmful effects on our auditory system is known as noise.
The graph shown in Figure was obtained during an experiment on a diode. (a) What type of diode is this? Give reasons. (b) Determine the forward current for a forward voltage
NEWTON'S FIRST LAW OF MOTION: This law states that "A body at rest will remain at rest and a body moving with uniform velocity will carry on doing so, until acted on by some un
A block of mass 10 kg is attached to the end of a horizontal spring with spring constant k = 1200 Nm-1. The block is assumed to be sitting on a frictionless horizontal surface.
Define Heat engine Heat engine is a device by which a system is made to undergo a cyclic process that results in conversion of heat into work. It is explained as the ratio o
(a) You have studied that plane and convex mirrors produce virtual images of objects. Can they generate real image under some circumstances? Explain. (b) A virtual image we a
The resistances of commercially-available discrete resistors are restricted to particular sets. For example, the available values of resistors with 10% tolerance are selections fro
What is the Ohm Law? Ohm discovered that the amount of current was directly proportional to the voltage (more voltage gives more current) and inversely proportional to the resi
Explain 'drift velocity of free electrons'? Derive Ohm's law on the basis of the theory of electron drift.
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