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प्रश्न
Describe the activity that shows that a current-carrying conductor experiences a force perpendicular to its length and the external magnetic field. How does Fleming’s left-hand rule help us to find the direction of the force acting on the current carrying conductor?
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उत्तर
The activity is as follows:
Take a small aluminum rod AB. Using two connecting wires suspend it horizontally from a stand, as shown in the figure given below.
A current- carrying rod AB experiences a force perpendicularto its length and the magnetic field
Place a strong horseshoe magnet in such a way that the rod lies between the two poles with the magnetic field directed upwards. For this put the North Pole of the magnet vertically below and the South Pole vertically above the aluminium rod.
Connect the aluminium rod in series with a battery, a key and a rheostat.
Now pass a current through the aluminium rod from end B to end A.
It is observed that the rod gets displaced towards the left due to the force experienced by it.
Fleming’s left-hand rule is used to find the direction of the force acting on the current carrying conductor. According to this rule, stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular as shown in the diagram. If the first finger points in the direction of magnetic field and the second finger in the direction of current, then the thumb will point in the direction of motion or the force acting on the conductor.
Fleming's left - hand rule
APPEARS IN
संबंधित प्रश्न
State Fleming’s left hand rule.
What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?
Draw the magnetic lines of force due to a circular wire carrying current.
State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
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
The magnetic field lines in the middle of the current-carrying solenoid are?
(a) circles
(b) spirals
(c) parallel to the axis of the tube
(d) perpendicular to the axis of the tube
For Fleming's left-hand rule, write down the three things that are 90° to each other, and next to each one write down the finger or thumb that represents it.
Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field.
If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force in the wire?
Name three factors on which the magnitude of force on a current carrying conductor placed in a magnetic field depends and state how does the force depend on the factors stated by you.
State condition when magnitude of force on a current carrying conductor placed in a magnetic field is maximum?
Name and state the law which is used to determine the direction of force on a current carrying conductor placed in a magnetic field.
State the unit of magnetic field in terms of the force experienced by a current carrying conductor placed in a magnetic field
State two ways to increase the speed of rotation of a D.C. motor.
Differentiate between conductors and insulators.
State whether a magnetic field is associated or not around a static charge.
The strength of magnetic field around a current-carrying conductor is ____________.
What do you know about Michael Faraday?
