A particle having mass m and charge q accelerated through a potential difference V. Find the force experienced when it is kept under perpendicular magnetic field \(\vec { B } \).

A thin insulated wire forms a plane spiral of N = 100 tight turns carrying a current I = 8 m A (milli ampere). The radii of inside and outside turns are a = 50 mm and b = 100 mm respectively. The magnetic induction at the centre of the spiral is ______.

The vertical component of Earth’s magnetic field at a place is equal to the horizontal component. What is the value of angle of dip at this place?

Which one of the following represents current magnetic field lines?

An electron of mass 0.90 x 10^-30kg under the action of a magnetic field moves in a circle of 2cm radius at a speed of 3 x 10⁶ m/s if a proton of mass 1.8 x 10^-27 kg was to move in a circle of the same radius in the same magnetic field, then its speed will be _______________.

Compare dia, para and ferro-magnetism.

What is meant by hysteresis?

Define remanence or retentivity?

What is meant by coercivity?

At a place, the horizontal component of earth's magnetic field is B and angle of dip is 60°. What is the value of horizontal component of the earth's magnetic field at equator?

Calculate the magnetic flux coming out from closed surface containing magnetic dipole (say, a bar magnet) as shown in figure.

Compute the intensity of magnetisation of the bar magnet whose mass, magnetic moment and density are 200 g, 2 A m² and 8 g cm^–3, respectively.

Using the relation \(\overset { \rightarrow }{ B } =\mu _{ ° }(\overset { \rightarrow }{ H+ } \overset { \rightarrow }{ M } )\) show that \({ x }_{ m }={ \mu }_{ r }-{ 1 }\)

State that a current carrying loop behaves as a magnetic dipole. Hence write an expression for its magnetic dipole moment.

Obtain an expression for magnetic Lorentz force?

What is the magnetic field at the centre of the loop shown in figure?

Two singly ionized isotopes of uranium \(_{ 92 }^{ 235 }{ U \ and \ _{ 92 }^{ 238 }{ U } }\) (isotopes have same atomic number but different mass number) are sent with velocity 1.00 x 10⁵ m s^–1 into a magnetic field of strength 0.500 T normally. Compute the distance between the two isotopes after they complete a semi-circle. Also, compute the time taken by each isotope to complete one semi-circular path. (Given: masses of the isotopes: m₂₃₅ = 3.90 x 10^–25 kg and m₂₃₈ = 3.95 x 10^–25 kg)

Deduce the expression for the torque \(\vec { \tau } \) when \(\hat { n } \) unit vector n is at an angle 8 with the field.

Two long and parallel street wires carrying current of 2A and 5A in the opposite direction are separated by a distance of 1 cm, Find the nature and magnitude of the magnetic force between them.