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प्रश्न
i) Which principle is explained in this figure?
ii) Which rule is used to find out the direction of a force in this principle?
iii) In which machine this principle is used? Draw a diagram showing working of that machine
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उत्तर
i. A force is exerted on the current-carrying conductor in the presence of a magnetic field.
ii. The Fleming’s Left-hand Rule is used.
iii. Electric Motor
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संबंधित प्रश्न
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.)
Which of the following correctly describes the magnetic field near a long straight wire?
Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
State qualitatively the effect of inserting an iron core into a current-carrying solenoid.
Name the rule for finding the direction of magnetic field produced by a straight current-carrying conductor.
Draw a sketch to show the magnetic lines of force due to a current-carrying straight conductor.
Draw the magnetic lines of force due to a circular wire carrying current.
What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
List three ways in which the magnetic field strength of a current-carrying solenoid can be increased?
The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of circular wire is:
(a) clockwise
(b) downwards
(c) anticlockwise
(d) upwards
The magnetic field associated with a current-carrying straight conductor is in anticlockwise direction. If the conductor was held along the east-west direction, what will be the direction of current through it? Name and state the rule applied to determine the direction of current?
What happens when a current-carrying conductor is placed in a magnetic field?
State two ways to increase the force on a current-carrying conductor in a magnetic field.
The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is:
45°
60°
90°
180°
Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if:
the current is stopped by removing the plug from the key?
Explain your answer mentioning the name of the phenomenon involved.
State condition when magnitude of force on a current carrying conductor placed in a magnetic field is zero?
A flat coil ABCD is freely suspended between the pole of U-shaped permanent magnet with the plane of coil parallel to the magnetic field.
What happens when a current is passed in the coil?
State Fleming’s left-hand rule.
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?
A flat coil ABCD is freely suspended between the pole of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field.
Name an instrument which makes use of the principle stated above.
Differentiate between conductors and insulators.
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be maximum.
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be Zero.
When current is parallel to a magnetic field, then force experience by the current-carrying conductor placed in a uniform magnetic field is ____________.
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 ____________.
For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is
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?
What do you know about Michael Faraday?
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':
Which of the following pattern correctly describes the magnetic field around a long straight wire carrying current?
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.
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The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.
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Name the law used to identify the radioactive radiation emitted by the element.
