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MAGNETIC EFFECTS OF ELECTRIC CURRENT

Magnetic effects of electric current Ques.1 State the properties of magnet? Ans.1 Magnets are of many shapes-bar magnet, hours shoes magnet, round magnet etc. A magnet has 2 poles- South pole and north pole unlike poles attract and like poles repel. Magnetic field line emerge from north and enter the south pole.   Ques.2 Draw… Read More »

SOURCES OF ENERGY

Sources of Energy QUES.1 What are Sources of energy? Ans. 1  A substance that provides us with energy in the form of heat,light etc. is  known as sources of energy. E.g Coal, petroleum, wood. Ques.2 State various types of sources of energy. Difference between them? Ans.2 Renewable Non-Renewable These are called alternative sources of energy… Read More »

ACID BASES AND SALTS

Acids, Bases and Salts   Ques.1 What are acids and bases? Ans.1 Solution that produce hydrogen ions and turn blue litmus are red called acids. Solution that produce hydroxide ions and turn red litmus blue are called bases. Ques.2 What are the physical properties of acids and bases? Ans.2 (a)  Acids- most acids are colourless.… Read More »

CHEMICAL REACTIONS AND EQUATIONS

Class 10 Chemical Reactions and Equations   CHEMICAL REACTION AND EQUATIONS Q1. Give some examples of reactions from your daily life that occurred around you? Ans1. Digestion of food Respiration Rusting of Iron Photosynthesis Cooking of Food Combustion   Q2. State the changes that take place during chemical reactions? Ans2. Change in state Change in… Read More »

Electricity

Electricity Class-10th Ques.1 What is current ? Write its S.I unit? Ans.1 Electric Current is expressed by the amount of charge flowing through a particular area. S.I unit – Ampere (A)   Ques.2  What the positive is the direction of current conventionality? Ans.2  From the positive terminal to negative terminal.   Ques.3 Give the expression… Read More »