A 50 cm long conductor AB moves with a speed 4 m/s in a magnetic field B = 0.01 `Wb // m^(2)` as shown. Find the e.m.f generated and power delivered if resistance of the circuit is `0.1Omega`

A proton with a speed of 2xx10^7 m.s-1 enters a magnetic field of flux density 1.5 Wb.m^-2 , making an angle of 30^@ with the field. The force acting on the proton is

A 0.5 m long metal rod PQ completes the circuit as shown. The area of the circuit is perpendicular to the magnetic field of flux density 0.15 T. If the resistance of the total circuit is 3Omega , calculate the force needed to move the rod in the direction as indicated with a constant speed of 2 m/s.

A proton with a speed of 2xx10^(7)m.s^(-1) enters a magnetic field of flux density 1.5Wb.m^(-2) , making an angle of 30^(@) with the field. The force acting on the proton is

A 1 m long metal wire has a cross sectional area of 0.1mm^2 . Find out the resistance of the wire if the resistivity of the metal is 1.8 times 10^-6 Omega.cm.

A rectangular conductor LMNO is placed in a uniform magnetic field of 0.5 T. The field is directed perpendicular to the plane of the conductor. When the arm MN of length of 20 cm is moved towards left with a velocity of 10 m . s^(-1) , calculate the emf induced in the arm. Given the resistance of the arm to be 5 Omega , (assuming that the other arms are of negligible resistance) find the value of the current in the arm.

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5 m . s^(-1) , at right angles to the horizontal component of earth's magnetic field, 0.30xx10^(-4)Wb.m^(-2) . what is the emf induced in the wire. Which end of the wire is at higher electrical potential?

A rectangular coil of area 20cm times 15cm and of 485 turns is rotating with a speed pf 1800 rpm in a magnetic field of intensity 20Wb .m^-2 .When the coil is inclined at 60^@ with the magnetic field , what will be the induced emf in the coil?

A horozontal straight wire 5m long extending from east to west is falling with a speed of 10 ms^-1 at right angles to the horizontal component of earth's magnetic field 0.40xx10^-4 Wb m^-2 . Find the instantaneous value of emf induced in the wire

An alpha -particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb//m^(2) . What is the de Broglie wavelength associated with the particle?

A straight conductor of length 0.5 m is placed in a magnetic field barB(2hati+4hatj) T. It carries a current 1A along +ve x-axis. The magnitude and direction of force acting on the conductor respectivley are -