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.
-
Charging of Insulators
Last modified on:4 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…
-
Charging by Contact
Last modified on:4 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…
-
Charging by Rubbing
Last modified on:4 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…
-
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…
