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प्रश्न
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.
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उत्तर
In a statement of Fleming's left-hand rule:
(a) Direction of centre finger represents current.
(b) Direction of forefinger represents magnetic field.
(c) Direction of thumb represents force.
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संबंधित प्रश्न
Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.
The magnetic field inside a long straight solenoid-carrying current ______.
Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)
Draw a sketch to show the magnetic lines of force due to a current-carrying straight conductor.
State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.
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
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
A current-carrying conductor is placed perpendicularly in a magnetic field. Name the rule which can be used to find the direction of force acting on the conductor.
Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field.
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
What is the force on a current-carrying wire that is parallel to a magnetic field? Give reason for your answer.
A flat coil ABCD is freely suspended between the pole pieces of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field.
When will the couple acting on the coil be
- maximum
- minimum?
Write Fleming’s left hand rule.
A current-carrying conductor is held in an exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:
A simple motor is made in a school laboratory. A coil of wire is mounted on an axle between the poles of a horseshoe magnet, as illustrated.
In the example above, coil ABCD is horizontal and the battery is connected as shown.
- For this position, state the direction of the force on the arm AB.
- Why does the current in the arm BC not contribute to the turning force on the coil?
Assertion (A): A magnetic field exerts a force on a moving charge in the same direction as the direction of the field itself.
Reason (R): The direction of force is given by Fleming’s left-hand rule.
A current-carrying conductor of a certain length, kept perpendicular to the magnetic field experiences a force F. What will be the force if the current is increased four times, the length is halved and the magnetic field is tripled?
Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':
