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प्रश्न
State and explain Maxwell’s Cork Screw Rule.
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उत्तर
Maxwell’s Cork Screw Rule:
Imagine a right handed cork screw placed parallel to a current carrying conductor such that when it is rotated, it advances in the direction of the current. Then the direction in which the thumb rotates gives the direction of the magnetic lines of forces.
संबंधित प्रश्न
The diagram shows a coil wound around a U shape soft iron bar AB.
1) What is the polarity induced at the ends A and B when the switch is pressed?
2) Suggest one way to strengthen the magnetic field in the electromagnet
3) What will be the polarities at A & B if the direction of current is reversed in the circuit?
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.
State three uses of an electromagnet?
What is an electric motor?
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electromagnet ______.
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
What is a permanent magnet? Give one use of it.
What will be the effect on the working of an electric bell if instead of a direct current an alternating current is used?
What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?
