At the magnetic north pole of the earth, the value of the horizontal component of Earth's magnetic field and angle of dip are respectively:
(a) Zero, maximum
(b) Maximum, minimum
(c) Maximum, maximum
(d) Minimum, minimum
Metals getting magnetized by orientation of atomic magnetic moments in an external magnetic field are called:
(a) Diamagnetics
(b) Paramagnetics
(c) Ferromagnetics
(d) Antimagnetics
A particle with a charge of -1.24 x 10^-8 C is moving with an instantaneous velocity = 4.19 x 10^4 m/s i + (-3.85 x 10^4 m/s) j. What is the force exerted on this particle by a magnetic field B = (140 T) i?
(a) (-6.68 x 10^4 N) i
(b) (-6.68 x 10^4 N) j
(c) (-6.68 x 10^4 N) k
(d) (-6.68 x 10^4 N) i + (-6.68 x 10^4 N) k
A particle of mass 0.195 g carries a charge of -2.50 x 10^-8 C. The particle is given an initial horizontal velocity that is due north and has a magnitude of 4.00 x 10^4 m/s. What is the magnitude of the minimum magnetic field that will keep the particle moving in the earth's gravitational field in the same horizontal, northward direction?
(a) 5.5 T
(b) 3.56 T
(c) 6.7 T
(d) 1.91 T
In a 1 T magnetic field, directed vertically upward, a particle having a charge of magnitude 1 C and initially moving northward at 1 km/s is deflected toward the east. Find the magnetic force on the particle?
(a) 1.00 N
(b) 0.001 N
(c) 0.100 N
(d) 0 N
A particle with mass 1.81 x 10^-3 kg and a charge of 1.22 x 10^-8 C has, at a given instant, a velocity = (3.00 x 10^4 m/s) j. What is the acceleration produced by a uniform magnetic field B = (1.63 T) i + (0.980 T) k?
