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Unit 4: Magnetic effects of electric current (Hindi)
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About this unit
Magnets are fun and mysterious. But they can do a lot more than just push and pull each other from a distance. In this chapter, we will learn about the intimate relationship between magnets and electric currents. And we will see how we can use this relationship to build amazing things like motors and generators that have become an essential part of our lives today.
How do magnets attract each other over a distance? What are magnetic fields? Why do we talk about these fields? We will explore all these questions in this section
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- Magnetic field lines: directionGet 3 of 4 questions to level up!
- Magnetic field lines: special propertiesGet 3 of 4 questions to level up!
- Magnetic field lines: field strengthGet 3 of 4 questions to level up!
Can we get magnetic fields without using a magnet? Turns out a man named Oersted figured out that we can, from electric current. Let's explore more in this section.
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- Right-hand thumb ruleGet 3 of 4 questions to level up!
- Magnetic field around a straight current-carrying wireGet 3 of 4 questions to level up!
Electromagnets are magnets whose properties can be controlled using electricity. Let's explore how to make one.
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- Direction of magnetic field due to a current-carrying circular loopGet 3 of 4 questions to level up!
- Magnetic field due to a current-carrying solenoidGet 3 of 4 questions to level up!
Current carrying wires can push on tiny magnets. So can magnets push on current carrying wires? In this section, we will explore just that.
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- Force on a current in a magnetic fieldGet 3 of 4 questions to level up!
- Fleming's left-hand ruleGet 3 of 4 questions to level up!
How does electric current make your fan spin? In this section we will explore the working of an electric motor.
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- Electric motor: parts and functionsGet 3 of 4 questions to level up!
- Electric motor: workingGet 3 of 4 questions to level up!
"What's the big deal?" asked a reporter when Faraday announced his great discovery. He replied, "one day our whole economy will run on this". More than 200 years later, our entire world is still powered by the same phenomenon, electromagnetic induction. In this section, we will explore this.
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- Electromagnetic inductionGet 5 of 7 questions to level up!
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