Magnetic Field Due to a Current-Carrying Straight Conductor

Sketch magnetic field lines around a current-carrying straight conductor.

On what factors do the magnitude of magnetic field due to current-carrying straight wire depend on?

A current-carrying straight conductor is placed in the East-West direction. What will be the direction of the force experienced by this conductor due to earth’s magnetic field? How will this force get affected on doubling the magnitude of current?

A current-carrying straight conductor is placed in the East-West direction. What will be the direction of the force experienced by this conductor due to earth’s magnetic field? How will this force get affected on reversing the direction of flow of current.

If current flowing through a conductor placed in magnetic field is halved (which is at right angles to each other), does it affect its deflection?

How will the magnetic field intensity at the centre of a circular coil carrying current change, if the current through the coil is doubled.

Give the factors that affect strength of magnetic field at a point due to a straight conductor carrying current.

How is the strength of the magnetic field at a point near a wire related to the strength of the electric current flowing in the wire?

What would you conclude from the observation that a current-carrying conductor deflects a magnetic needle placed near it?

A straight wire carrying electric current is moving out of plane of paper and is perpendicular to it. What is the direction and type of induced magnetic field?

What is the nature of the pattern of lines of force around a straight conductor carrying current?

Why is a magnetic needle deflected when it is placed near a current-carrying conductor?

How can it be shown that magnetic field exists around a wire carrying current?

Explain with the help of a labelled diagram the distribution of the magnetic field due to a current through a circular loop. Why is it that if a current-carrying coil has $\mathrm{n}$ turns the field produced at any point is $\mathrm{n}$ times as large as that produced by a single turn?  

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?

Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current-carrying loop is brought near it? Describe some salient features of magnetic lines of field concept.

Meena draws magnetic field lines of field close to the axis of a current-carrying circular loop. As she moves away from the centre of the circular loop she observes that the lines keep on diverging. How will you explain her observation?

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 neutrons? Justify your answer.

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? Justify your answer.

A magnetic compass shows a deflection when placed near a current-carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason.