CBSE Class 7 - Magnetic Effect of Electric Current Videos

• of which material is the coil of an electromagnet usually made?
• Please explain:-  what is electromagnetism?
• why is a battery called battery
• What happens when we increase the number of turns in a solenoid?
• What is electromagnets  
• which procedure will you follow to study magnetic field , if you are provided with paraffin oil, iron nail, bar magnet, battery, coil, conductor wire???
• When current is switched on an electric fan converts which energy (mainly) into which energy  
• Manav made an electric circuit and placed a magnetic compass near it. What will happen to the magnetic needle when he switches the circuit ' ON '? Justify your answer.
• What do you mean by an electromagnet?
• What is the function of needle in a magnetic compass?

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