A MAGNETISED NEEDLE IN A UNIFORM MAGNETIC FIELD EXPERIENCES
A TORQUE BUT NO NET FORCE
. HOWEVER, AN IRON NAIL NEAR A BAR MAGNET EXPERIENCES A FORCE OF ATTRACTION IN ADDITION TO TORQUE.
When a magnetic needle is placed in a uniform magnetic field then needle will experience?
A MAGNETISED NEEDLE IN A UNIFORM MAGNETIC FIELD EXPERIENCES
A TORQUE BUT NO NET FORCE
. HOWEVER, AN IRON NAIL NEAR A BAR MAGNET EXPERIENCES A FORCE OF ATTRACTION IN ADDITION TO TORQUE.
What happens when magnetic needle is kept in a uniform magnetic field?
Due to changes in Magnitude, the dipole undergoes a Force, Due
to changes in direction the dipole undergoes a Torque
. So, this torque will keep the needle aligned with the uniform magnetic field. A uniform magnetic field will have equal magnitude and direction all over its area.
When a magnet is placed in a uniform magnetic field it experiences?
When a magnet is placed in a uniform magnetic field it experiences
a torque but not a force
. When a magnet is placed in a non-uniform magnetic field, it experiences both force and torque.
When a magnetic needle placed in non-uniform field the needle may experience?
Magnetic needle is placed in non-uniform magnetic field. It
experiences force and torque both due to unequal forces acting on poles
.
What is the basic difference between electric field and magnetic field?
A magnetic field is a field explaining the magnetic influence on an object in space. A electric field is a field defined by the
magnitude of the electric force
at any given point in space. Current is the rate of charge moving past a region.
What happens when a magnetic substance is heated?
When a magnetic substance is heated
it loses its magnetic property
. It is because all the atomic magnet becomes randomly oriented due to heat.
What happens to the force between magnetic pole?
Hint: The force between two magnetic poles is
proportional to the product of the strength of the magnetic poles
and inversely proportional to the square of the distance between these two magnetic poles.
Why can a frog be levitated in a solenoid that carries current?
The frog can be
laviating in the magnetic field
which is produced by a current in a vertical solenoid. To levitate a body, a force must be applied on it which at least balances the body’s weight will always pull the frog down, it must act in the upward direction. Thus, the frog is repelled by the magnetic field.
Do All magnets have north and south?
All magnets have north and south poles
. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.
Is magnetic field uniform inside a bar magnet?
No, the magnetic field lines inside the bar magnet are
non-uniform
. They are curved in the nature.
Why magnetic field around a bar magnet is non uniform?
The magnetic field due to a bar magnet is non-uniform. The magnetic field in an area is non-uniform
if it has dissimilar magnetic intensities at diverse points in the area
.
When a magnetic field is applied on a stationary electron it?
A stationary electron cannot make current
. As the electric field is steady, there is no magnetic field. The magnetic field B is defined in terms of force on moving charge in the Lorentz force law. The SI unit of the magnetic field is Tesla.
When a bar magnet is kept at an angle of 30?
A bar magnet when placed at an angle of 30^(@) to the direction of magnetic field field induction of 5xx10^(-2)T, experiences a moment of couple 25xx10^(-6) N-m.
What are magnetic field lines?
Magnetic field lines are defined to
have the direction that a small compass points when placed at a location
. (a) If small compasses are used to map the magnetic field around a bar magnet, they will point in the directions shown: away from the north pole of the magnet, toward the south pole of the magnet.
What are the similarities and differences between an electric field and a magnetic field?
Similarities between magnetic fields and electric fields:
Electric fields are produced by two kinds of charges, positive and negative
. Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges).
