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प्रश्न
- Assertion: A compass needle is placed near a current-carrying wire. The deflection of the compass needle decreases when the magnitude of the current in the wire is increased.
- Reason: The strength of a magnetic field at a point near the conductor increases by increasing the current.
विकल्प
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, and R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
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उत्तर
A is false but R is true.
Explanation:
The current flowing through a conductor has a direct relationship with its magnetic field. The magnetic field's inverse proportionality to the perpendicular distance from the wire causes the needle's deflection to decrease. The amount of current flowing is always inversely correlated with the strength of the magnetic field. As a result, as the current grows, so does the magnetic field.
संबंधित प्रश्न
On reversing the direction of the current in a wire, the magnetic field produced by it gets ______.
Draw a diagram showing the directions of three magnetic field lines due to a straight wire carrying current. Also show the direction of current in the wire.
How is the magnetic field due to a straight current carrying wire affected if current in wire is decreased?
Describe a set up for plotting the magnetic lines of force in: (i) A straight wire, (ii) A circular coil and (iii) A straight solenoid.
Which of the following statement is not correct about the magnetic field?
Magnetic lines of force inside current carrying solenoid are ____________.
A magnetic compass needle is placed in the plane of paper near point A as shown in Figure. In which plane should a straight current carrying conductor be placed so that it passes through A and there is no change in the deflection of the compass? Under what condition is the deflection maximum and why?
With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?
These consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: On freely suspending a current – carrying solenoid, it comes to rest in Geographical N-S direction.
Reason: One end of current carrying straight solenoid behaves as a North pole and the other end as a South pole, just like a bar magnet.
When is the force experienced by a current-carrying straight conductor placed in a uniform magnetic field.
- Maximum
- Minimum
