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प्रश्न
State Fleming’s right-hand rule.
उत्तर
- The Thumb, index finger, and middle finger of the right hand are stretched perpendicular to each other.
- The index finger indicates the direction of the magnetic field.
- Thumb indicates the direction of motion of the conductor.
- The middle finger indicates the direction of induced current.
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संबंधित प्रश्न
Explain why, the core of an electromagnet should be of soft iron and not of steel.
State the factors on which the strength of an electromagnet depends. How does it depend on these factors?
Write some of the important uses of electromagnets.
- What kind of energy change takes place when a magnet is moved towards a coil having a galvanometer at its ends?
- Name the phenomenon.
Answer the following:
State the principles of the electric motor and electric generator.
List two ways of increasing the strength of an electromagnet if the material of the electromagnet is fixed.
Draw a labelled diagram to make an electromagnet from a soft iron bar. Mark the polarity at its ends in your diagram. What precaution would you observe while making it?
Find the odd one out and give its explanation.
Write the two names in the following diagram.
Fleming’s right hand rule.
A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then ____________.
