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प्रश्न
Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':
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उत्तर
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संबंधित प्रश्न
Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
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The magnetic field inside a long circular coil carrying current well be parallel straight lines.
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(b) will increase
(c) will become zero
(d) will remain the same
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(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left
When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
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 Fleming's left-hand rule. Explain it with the help of labelled diagrams.
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45°
60°
90°
180°
In the simple electric motor of figure given below, the coil rotates anticlockwise as seen by the eye from the position X when current flows in the coil
Is the current flowing clockwise or anticlockwise around the coil when viewed from above?
Which way does the wire in the diagram below tend to move?
force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
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:
a current is passed through coil B by plugging the key?
Explain your answer mentioning the name of the phenomenon involved.
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.
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State the unit of magnetic field in terms of the force experienced by a current carrying conductor placed in a magnetic field
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- Why is a commutator necessary for continuous rotation of the coil?
- Complete the diagram with commutator, etc. for the flow of current in the coil?
State two ways to increase the speed of rotation of a D.C. motor.
Name and state the rule of determine the direction of force experienced by a current carrying straight conductor placed in a uniform magnetic field which is perpendicular to it.
The following diagram shows two parallel straight conductors carrying the same current. Copy the diagram and draw the pattern of the magnetic field lines around them showing their directions. What is the magnitude of the magnetic field at a point 'X' which is equidistant from the conductors? Give justification for your answer.
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The strength of magnetic field around a current-carrying conductor is ____________.
A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act ____________.
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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?
Which of the following pattern correctly describes the magnetic field around a long straight wire carrying current?
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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.
