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प्रश्न
Describe how you will locate a current-carrying wire concealed in a wall.
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उत्तर
We know that a current-carrying wire produces magnetic field. Therefore, we can locate a current-carrying wire concealed in a wall by detecting the magnetic field produced by the wire. It is done with the help of a compass.
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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 in a given region is uniform. Draw a diagram to represent it.
Which of the following correctly describes the magnetic field near a long straight wire?
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?
State Fleming’s left hand rule.
State qualitatively the effect of inserting an iron core into a current-carrying solenoid.
Fill in the following blank with suitable words:
For a current-carrying solenoid, the magnetic field is like that of a ...........
What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
Name any two factors on which the strength of magnetic field produced by a current-carrying solenoid depends. How does it depend on these factors?
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?
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.
A horizontal wire carries a current as shown in Figure below between magnetic poles N and S:
Is the direction of the force on the wire due to the magnet:
(a) in the direction the current
(b) vertically downwards
(c) opposite to the current direction
(d) vertically upwards
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?
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?
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.
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.
State whether a magnetic field is associated or not around a static charge.
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:
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
