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.
-
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…
-
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…
-
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…
-
IMPORTANT QUESTIONS (Heredity & Evolution)
Last modified on:5 years agoReading Time:30MinutesI. VERY SHORT ANSWER TYPE QUESTIONS (1 Mark) Q1. Define heredity. Ans. Heredity deals with the inheritance of characters from one generation to the next. Q2. Define variations. Ans. Variations are differences that occur between the organisms of the same species in spite of the same basic feature. Q3. How does the…
-
TEST YOUR SKILLS (Heredity & Evolution)
Last modified on:5 years agoReading Time:2MinutesQ1. Name two human traits that show variations. Q2. Who is known as the ‘father of genetics’? Q3. What is microevolution? Q4. What is the probability that a human progeny will be a boy? Q5. What is a gene? Q6. What is genetic drift? Q7. State the importance of variations. Q8.…
-
HEREDITY & EVOLUTION (IN-TEXT QUESTIONS SOLVED)
Last modified on:5 years agoReading Time:22MinutesNCERT IN-TEXT QUESTIONS SOLVED Q1. If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier? Ans. Trait B is likely to have arisen earlier as it occurs…
