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प्रश्न
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
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उत्तर
By having a solenoid of large diameter or more cross-sectional area, the intensity of magnetic field increases.
संबंधित प्रश्न
Suppose you are given a long bar magnet and you are asked to break it into four small magnets. Draw diagrams showing the polarities of each broken part.
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
What is an electromagnet?
Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.
What is an electric motor?
What is an electromagnet?
How does a magnetic field set up by a solenoid change when number of turns are increased?
State three factors which govern the speed of rotation of an electric motor.
Point out three differences between an electromagnet and a bar (or permanent) magnet.
Write the answer in your word.
How is an electromagnet made?
