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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Frictional Electricity
Last modified on:3 years agoReading Time:10Minutes What is frictional electricity? Frictional electricity, also known as static electricity, is the type of electricity that results from the friction or rubbing of two objects together. When two objects are rubbed against each other, the friction between them can cause the transfer of electrons from one object to the…
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Alternating Current
Last modified on:3 years agoReading Time:24Minutes What is Alternating Current (A.C.)? Alternating Current (AC) is an electrical current that periodically reverses direction in a circuit. Unlike Direct Current (DC), which flows only in one direction, AC constantly changes its polarity and magnitude over time. Explanation: In an AC circuit, electrons periodically switch direction, moving back and…
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Terminal Velocity
Last modified on:3 years agoReading Time:13Minutes What is Terminal Velocity? Terminal velocity is the constant maximum speed reached by an object in free fall or falling through a fluid (such as air or water) when the force of air resistance or fluid resistance becomes equal in magnitude and opposite in direction to the force of gravity…
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MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom
Last modified on:3 years agoReading Time:13MinutesHere we are providing MCQ Questions for class 9 Science Chapter 4 Structure of the Atom. These questions are prepared by subject experts. Students can practice these questions for better performance in the exam. Answers are kept hidden. You will be able to check the answer by clicking on the ‘Answer‘…
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NEET DPP Biology Ch-25 Human Reproduction
Last modified on:5 years agoReading Time:27MinutesQ.1. Breast feeding suspends pregnancy due to(a) post pregnancy lower levels of FSH and LH(b) post pregnancy higher levels of FSH and LH which put negative check on ovulation(c) inhibiting the release of LH by prolactin and thus countering the effects of LH on the ovarian follicles(d) increasing the release of…
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NEET DPP Biology Ch-24 Sexual Reproduction In Flowering Plants
Last modified on:5 years agoReading Time:27MinutesQ.1. Entry of pollen tube through micropyle is(a) Chalazogamy (b) Mesogamy(c) Porogamy (d) Pseudogamy Answer Answer: (c) In porogamy the tip of pollen tube enters the micropyle, pushes through the nucellar tissue & finally pierces the eggapparatus end of the embryo sac. If pollen tube enters through the chalazal side it…
