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प्रश्न
State whether the following statement is true or false
The field at the centre of a long circular coil carrying current will be parallel straight lines.
विकल्प
True
False
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उत्तर
This statement is true.
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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.)
When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
State the rule to determine the direction of a force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
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 ...........
State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
What type of core should be put inside a current-carrying solenoid to make an electromagnet?
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same
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
force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?
State the unit of magnetic field in terms of the force experienced by a current carrying conductor placed in a magnetic field
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
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be maximum.
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?
A copper wire is held between the poles of a magnet
The current in the wire can be reversed. The pole of the magnet can also be changed over. In how many of the four directions shown can the force act on the wire?
