Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
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Charging of Insulators
Last modified on:5 years agoReading Time:2Minutes Charging of Insulators Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of…
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Charging by Contact
Last modified on:5 years agoReading Time:2Minutes Charging by Contact When a negatively charged ebonite rod is rubbed on a metal object, such as a sphere, some of the excess electrons from the rod are transferred to the sphere. Once the electrons are on the metal sphere, where they can move readily, they repel one another and…
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Charging by Rubbing
Last modified on:5 years agoReading Time:3Minutes Charging by Rubbing The simplest way to charge certain bodies is to rub them against each other. When a glass rod is rubbed with a silk cloth, the glass rod acquires some positive charge and the silk cloth acquires negative charge by the same amount. The explanation of appearance of…
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CLASS 12 Physics EMI & AC (VSQ)
Last modified on:5 years agoReading Time:16MinutesQ1. When are the voltage and current in LCR a.c. circuit in same phase? Answer- When the frequency of a.c applied becomes equal to the natural frequency of the LCR circuit (resonance occur when XL= XR) the voltage and current comes in same phase Q2. What is the power factor of…
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Questions on Magnetic Materials
Last modified on:5 years agoReading Time:5MinutesQ1. The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents. Q2. In what way is the behaviour of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field? Q3. Depict the behaviour of magnetic field lines in the…
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Questions on Earth’s Magnetism
Last modified on:5 years agoReading Time:5MinutesQ1. Where on the surface of Earth is the vertical component of Earth’s magnetic field zero? Q2. The horizontal component of the earth’s magnetic field at a place is B and angle of dip is 60°. What is the value of vertical component of earth’s magnetic field at equator?…
