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Consider a long straight conducting wire that terminates in a metal sphere of radius r = 0.50 ± 0.01 cm. Suppose the wire is carrying a current of / = 3.0 ± 0.2 A in order to charge the sphere (positively).
(a) Sketch the shape of the electric and magnetic fields around the wire and the sphere.
(b) Discuss the relative merits of using the Biot-Savart law and Ampere's law to calculate the magnetic field around the wire. In this case, is it necessary to include the Maxwell correction to Ampere's law?
(c) Calculate the magnetic field strength at point P. which lies a distance of d = 1.00 ± 0.01 cm from the wire and I? = 10.0 ± 0.1 cm from the centre of the ball.
(d) Calculate the uncertainty in the magnetic field strength. Does the fact that this wire is not infinite in extent make a significant impact on the results? Explain.
If 3.43×10^8 electrons flow through the ground wire to Earth and the ground wire is then removed, what is the net charge on the electroscope.
Calculating magnetic flux, induced current & magnetic field.
Two cars with equal mass collide head on. One car is going 18 mph. That car is push backward about 38 feet. What is the speed of other vehicle.
an object of mass m=3.1g and charge q=+48 is attached to a string, find the magnitude of the electric field and the tension in the string
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You are the design engineer in charge of the crashworthiness of new automobile models. What is the average force acting on the car by the inner barrier
You plan to fly a model airplane of mass 0.390 kg that is attached to a horizontal string. The plane will travel in a horizontal circle of radius 5.90 m. Find the speed at which you must fly the plane
Suppose a constant ratio of 13.60 counts per minute per gram of living matter. A sample of a petrified tree was found to give 1.8 counts per minute per gram. How old is the tree.
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 7.00 V. What is the power drawn from the electric outlet
A student is doing Lab 3: Motion in One Dimension. The student places 50 g on the cart and 50 g one the hanger, What happens to the acceleration
A 0.178 kg ball is released from rest at the top of a 57.9 m tall building. Calculate the de Broglie wavelength of the ball
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