Advertisements
Advertisements
प्रश्न
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
Advertisements
उत्तर
According to Fleming's left-hand rule, when thumb, forefinger and central finger are kept mutually perpendicular:
(a) Thumb represents force.
(b) Forefinger represents magnetic field.
(c) Central finger represents current.

APPEARS IN
संबंधित प्रश्न
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ______.
Name the rule for finding the direction of magnetic field produced by a straight current-carrying conductor.
State whether the following statement is true or false:
The magnetic field inside a long circular coil carrying current well be parallel straight lines.
Draw a sketch to show the magnetic lines of force due to a current-carrying straight conductor.
What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.
Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles
What type of core should be put inside a current-carrying solenoid to make an electromagnet?
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same
A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should passed in the conductor:
(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left
In a statement of Fleming's left-hand rule, what do the following represent?
(a) direction of centre finger.
(b) direction of forefinger.
(c) direction of thumb.
State two ways to increase the speed of rotation of a D.C. motor.
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be maximum.
The north pole of Earth’s magnet is in the ____________.
The direction of force on a current carrying conductor in a magnetic field is given by ____________.
The diagram below shows a free conductor AB is kept in a magnetic field and is carrying current from A to B. (To avoid confusion complete path of the circuit is not shown) The direction of the force experienced by the conductor will be:

Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':

An alpha particle enters a uniform magnetic field as shown. The direction of force experienced by the alpha particle is ______.

Assertion (A): A current carrying straight conductor experiences a force when placed perpendicular to the direction of magnetic field.
Reason (R): The net charge on a current carrying conductor is always zero.
If the strength of the current flowing through a wire is increased, the strength of the magnetic field produced by it ______.
