Advertisements
Advertisements
Question
How is the magnetic field due to a straight current carrying wire affected if current in wire is reversed?
Advertisements
Solution 1
The direction of magnetic field lines will get reversed.
Solution 2
Although the iron filing pattern remains unchanged when the wire's current flow is reversed, the compass needle's direction of deflection is changed.
APPEARS IN
RELATED QUESTIONS
On reversing the direction of the current in a wire, the magnetic field produced by it gets ______.
How is the magnetic field due to a straight current carrying wire affected if current in wire is decreased?
What is the nature of the lines of force of the magnetic field due to a straight current carrying wire?
In the diagram XY is a straight conductor carrying current in the direction marked by the arrow. The conductor is held vertical by passing it through a horizontal cardboard sheet.
Draw three magnetic lines of force on the board and mark the direction of magnetic field in your diagram. State two factors on which magnitude of magnetic field at a point, depends.
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?
It is established that an electric current through a metallic conductor produces a magnetic field around it. Is there a similar magnetic field produced around a thin beam of moving
- alpha particles,
- neutrons? Justify your answer.
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.
A compass needle is placed near a current carrying wire. State your observations for the following cases and give reasons for the same in each case -
- Magnitude of electric current in wire is increased.
- The compass needle is displaced away from the wire.
When is the force experienced by a current-carrying straight conductor placed in a uniform magnetic field.
- Maximum
- Minimum
- 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.
