Advertisements
Advertisements
प्रश्न
State two ways to increase the speed of rotation of a D.C. motor.
उत्तर
By increasing the magnetic flux [by using strong magnet]
By reducing number of turns in the winding.
APPEARS IN
संबंधित प्रश्न
The magnetic field inside a long straight solenoid-carrying current ______.
Fill in the following blank with suitable words:
For a current-carrying solenoid, the magnetic field is like that of a ...........
Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles
What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate?
The diagram given below represents magnetic field caused by a current-carrying conductor which is:
(a) a long straight wire
(b) a circular coil
(c) a solenoid
(d) a short straight wire
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?
Differentiate between Conductors and insulators.
Which of the following factors affect the strength of force experience by current-carrying conduct in a uniform magnetic field?
A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act ____________.
