मराठी

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

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प्रश्न

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

पर्याय

  • The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid

  • The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid

  • The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet

  • The N- and S-poles exchange position when the direction of current through the solenoid is reversed

MCQ
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उत्तर

The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet

Explanation - 

Option (a), (b) and (d) are correct. Only option (c) is incorrect because the pattern of magnetic fields due to solenoid and bar magnet is almost the same.

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पाठ 13: Magnetic Effects of Electric Current - Multiple Choice Questions [पृष्ठ ९८]

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एनसीईआरटी एक्झांप्लर Science Exemplar Class 10
पाठ 13 Magnetic Effects of Electric Current
Multiple Choice Questions | Q 4. | पृष्ठ ९८

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.


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.)


State Fleming’s left-hand rule.


What concealed do you get from the observation that a current-carrying wire deflects a compass needle placed near it?


What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?


 What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil 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


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.


 Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field. 


A current flows in a wire running between the S and N poles of a magnet lying horizontally as shown in Figure below: 

The force on the wire due to the magnet is directed: 

fron N to S
 from S to N
 vertically downwards
 vertically upwards


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 zero?


Name and state the law which is used to determine the direction of force on a current carrying conductor placed in a magnetic field.


Name the following diagram and explain the concept behind it.


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.


Which of the following factors affect the strength of force experience by current-carrying conduct in a uniform magnetic field?


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':


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.

Name the law used to identify the radioactive radiation emitted by the element.


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