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प्रश्न
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.
उत्तर
The magnetic lines of force due to current in the straight conductor XY are shown in figure given alongside. The arrows on the magnetic lines of force shows the direction of magnetic field.
The magnitude of the magnetic field at a point depends on:
(i) The strength of the current in the conductor, and
(ii) The distance of a point from the conductor.
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संबंधित प्रश्न
How is the magnetic field due to a straight current carrying wire affected if current in wire is decreased?
How is the magnetic field due to a straight current carrying wire affected if current in wire is reversed?
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?
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?
AB is a current carrying conductor in the plane of the paper as shown in Figure. What are the directions of magnetic fields produced by it at points P and Q? Given r1 > r2, where will the strength of the magnetic field be larger?
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.
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.
Two LED bulbs of 12W and 6W are connected in series. If the current through 12W bulb is 0.06A the current through 6W bulb will be ______.
- 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.
