Electric current and its effects · विद्युत धारा और इसके प्रभाव
A free Physics lesson for Class 7 children.
An electric circuit is a closed path along which current flows.
A cell has a positive and a negative terminal.
Two or more cells joined together make a battery.
When the switch is closed the circuit is complete and the bulb glows.
A wire gets hot when current flows through it. This is the heating effect.
A fuse wire melts and breaks the circuit when the current is too large.
Current in a coil of wire makes it behave like a magnet. This is an electromagnet.