Cyclotron is used to _______________.

Lorentz force generally refers to force experienced by a charge due to combined action of _________________.

Consider the motion of a charged particle in a uniform magnetic field directed into the paper. If velocity v of the particle is in the plane of the paper, the charged particle will describe a _____________.

If a current I is flowing in a straight wire parallel to the x-axis and magnetic field is in the y-axis then the wire experiences in _________________.

The direction of the magnetic force on a positive charge moving in a magnetic field is given by ________________.

A current carrying conductor is associated with  _______________.

A long straight conductor carrying a current lies along the axis of a ring. The conductor will exert a force on the ring if _______________.

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 _______________.

When current is doubled deflection is also doubled in ______________.

The most suitable metal for permanent magnet is ______________.

The angle of dip at a place, when horizontal and vertical components of earth's field are equal is ______________.

Which one of the following represents current magnetic field lines?

Four wires each of length 2m are bent into four loops P, Q, R, and S, and then suspended into a uniform magnetic field as shown in the figure same current is passed in each loop. On which loop the couple will be the highest?

Which of the following graphs shows the variation of magnetic induction B with distance 'r' from along wire carrying current?

A simple pendulum with charged bob is oscillating with time period T and lets θ be the angular displacement. If the uniform magnetic field switched ON in a direction perpendicular to the plane of oscillation then ___________.