Home
Class 9
PHYSICS
How can the speed of rotation of a coil ...

How can the speed of rotation of a coil be increased? Write at least three methods.

Text Solution

Verified by Experts

The speed of rotation of a coil can be increased by
(i) increasing the strength of the current in the coil
(ii) increasing the area of the coil
(iii) increasing the strength of the magnetic field.
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND ELECTROMAGNETISM

    FULL MARKS|Exercise ADDITIONAL QUESTIONS ( LONG ANSWERS QUESTIONS):|2 Videos

  • MAGNETISM AND ELECTROMAGNETISM

    FULL MARKS|Exercise IN-TEXT PROBLEMS|3 Videos

  • MAGNETISM AND ELECTROMAGNETISM

    FULL MARKS|Exercise EXERCISE ( ANSWER IN DETAIL):|3 Videos

  • LIGHT

    FULL MARKS|Exercise ACTIVITY|4 Videos

  • MOTION

    FULL MARKS|Exercise Activity|6 Videos

Similar Questions

Explore conceptually related problems

The speed of rotation of an electric motor can be increased by decreasing the area of the coil

How is ethylene glycol prepared ? Give three methods.

Jagaseesh was rotating a stone tied to an elastic rubber band. As time passes he kept on increasing its speed of rotation. As the speed increased, the length (i.e. radius) of the band was also increasing. His father Mr. Sridhar watched this and called Jagadeesh. When Jagadeesh came near by his father rotating the stone tied to the elastic band, he asked how this happened? (i) State Keper's III law and give an expression.

Jagaseesh was rotating a stone tied to an elastic rubber band. As time passes he kept on increasing its speed of rotation. As the speed increased, the length (i.e. radius) of the band was also increasing. His father Mr. Sridhar watched this and called Jagadeesh. When Jagadeesh came near by his father rotating the stone tied to the elastic band, he asked how this happened? (ii) What are Apogee and Perigee?

How can we increase the stability of an object?

Fig. E.I show s magnet coil experiment of electromagnetic induction. What happens when a. i. The number of turns of the coil is inceased. ii. The streangth of the magnet is increased. iii. The speed of motion of the magnet is increased. b. An induced e.m.f. has no direction of its own. Why?

Theory of relativity reveals that mass can be converted into energy. The energy E so obtained is proportional to certain powers of mass m and the speed c of light. Guess a relation among the quantities using the method of dimensions.

How can we increase the capacitance of a conductor?

A gentleman wants to invite 6 friends. In how many ways can he send invitation cards to them, if he three servants to deliver the cards ?