Magnetic Effect...

Select correct statement(s) regarding cyclotron

A short wire of length L and mass m is placed along northsouth direction on rough surface of friction coefficient . A charge q instantly flows through this wire. Take horizontal and vertical components of magnetic field of earth B_H and B_V respectively. The distance travelled by wire before it comes to rest.

If Ab = Bc = L, Then The Net Magnetic Force On The Rod Is

A conducting rod AC of length 4l is rotated about a point O in a uniform magnetic field directed into the paper. AO = l and OC = 3l. Then

A charged particle enters a uniform magnetic field with velocity vector making an angle of 30° with the magnetic field. The particle describes a helical trajectory of pitch x. The radius of the helix is

A wire of length  metres carrying a current I amperes is bent in the form of a circle. The magnitude of the magnetic moment is

Equal current I flows in circular wire segments ACB and ADB of equal radius r as shown in figure. If θ = 60°, the magnetic field at centre O is

Find The Magnetic Field At Point P As Shown In Figure Below 

A charged particle moves through a magnetic field directed perpendicular to its direction of motion. Which of the following quantities of the particle will not change?

A long solenoid of cross-sectional radius R has a thin insulated wire ring tightly put on its winding. One half of the ring has the resistance 10 times that of the other half. The magnetic induction produced by the solenoid varies with time as B = bt, whose b is a constant. Find the magnitude of the electric field strength in the ring.