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A long, straight, copper wire with a circular cross-sectionalarea of 2.1mm2 carries a current of 16 A. Theresistivity of the material is 2.0 X 10-8 O m.
a) What is the uniform electric field in thematerial?
b) If the current is changing at the rate of 4000 A/s, at whatrate is the electric field in the material changing?
c) What is the displacement current density in the material inpart (b)?
d) If the current is changing as in part (b), what is themagnitude of the magnetic field 6.0cm from the center of the wire?Note that both the conduction current and the displacement currentshould be included in the calculation of B. Is the contributionfrom the displacement current significant?
The 80-lb boy and 60-lb girl walk towards each other with a constant speed on the 300-lb cart. find the distance the cart has traveled at the instant the boy and girl meet
an icy planet at some mass M and radius R is spinning at some velocity W the ice melts into space at the constant rate of K (masses/sec), at what rate is the velocity changing
How much voltage is produced by an inductor of value 25 ?H if the time rate of change of the current is 58 mA/s
At the Earth's surface, a projectile is launched straight up at a speed of10.5km/s. To what height will it rise
Relationships between wavelength, frequency and speed.
A battery with an emf of 12 volts is coonected to a 60 watt light bulb and an ammeter. The ammeter reads 75 mA
A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. What is the electric-field energy stored in the capacitor
A 40.00-W eletric motor is able to accelerate a 8755 g car from rest to 30.00 mph in 31.10 seconds. Calculate the efficiency of the motor
1) Find the net force acting on particle 3 due to the presence of the other two particles. Report you answer as a magnitude and a direction measured from the positive x axis.
If a wire has the dimensions 2 meter long and a radius of 1mm and the linear density of 10g/m, what is the mass of the wire
A single slit has aperture width 4.54 μm and lies 14.9 cm from a screen. If light of wavelength 420 nm falls on the slit, find the width of the central maximum in centimeters
After a fall, a 96 kg rock climber finds himself dangling from the end of a rope that had been 17 m long and 9.9 mm in diameter but has stretched by 3.1 cm. For the rope, calculate (a) the strain, (b) the stress, and (c) the Young's modulus.
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