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A rectangular sample of a metal is 3.8 cm wide and 600 µm thick. When it carries a 30 Acurrent and is placed in a 0.8 T magnetic field it produces a 6.5µV Hall emf
a) Determine the Hall field in the conductor.b) Detrmine the drift speed of the conduction electrons.c) Determine the density of free electrons in the metal.
for a double-slit experiment the inside edges of two 1.65-mm wide slits are separated by a distance of 1.31 mm. the
an ambulance moving at 42 ms sounds its siren whose frequency is 450hz. a car is moving in the same direction as the
An asteroid is discovered heading straight toward Earth at 14km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 {rm min}, after which asteroid is moving at 26^circ to its original path at a..
Two point charges Q1=+5.00 nC and Q2= -3.00 nC are separated by 35.0cm. (a) What is the electric potential at a point midway between the charges? (b) What is the potential energy of the pair of charges? What is the significance of the algebraic si..
Two people, one of mass 75kg and the other of mass 60kg, sit in a rowboat of mass 80 kg. With the boat initially at rest, two people, who have been sitting at opposite ends of the boat 3.2 m apart from each other, now exchange seats. How far and i..
how many electrons must be removed from each of two 4.8-kg copper spheres to make the electric force of repulsion
A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 768 Hz and 1152 Hz, with no other resonant frequency between these values. What is the fundamental frequency of this string
q1. an electric force of 4.0 n exists between two objects separated from each other by a distance of r. if the distance
If global warming occurs over the next century, it is likely that the polar ice caps of the earth will melt and the water will be distributed closer to the equator. How would this change the moment of inertia of the earth? Would the length of a day (..
Suppose you hear a clap of thunder 17.2 s after seeing the associated lightning strike. How far are you from the lightning strike
q1. one end of a cord is fixed and a small 0.500kg object is attached to the other end where it swings in a section of
A horizontal power line of length 52 m carries a current of 1.4 kA, find direction of the magnetic force on the power line
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