In this problem, you will design a shake flashlight that can power a standard 1W, 3V flashlight bulb. In a shake flashlight, a coil of wire and magnet are inside a plastic tube that can be shaken, causing the magnet to move back and forth through the coil. Assume the magnet has a maximum field strength of 0.05 T. Making additional reasonable assumptions as needed, specify the dimensions and number of turns of the coil of wire in your flashlight

Alexa and Jeremiah now work on a problem. A beam of protons enter the electric field of magnitude E = 0.800 N/C between a pair of parallel plates. There is a magnetic field between the plates. The magnetic field is parallel to the plates and perpendicular to the initial direction of the protons, and its magnitude is 2.30 T. The proton beam passes through undeflected. What is the speed of the protons? m/s Submit Skip (you cannot come back)

A 1 kg horizontal aluminum bar, 0.1 m long, is pushed by a force F between two vertical metal rods that are 0.1 m apart. A 0.1T magnetic field is directed perpendicular to the plane of the rods as indicated. A 5 Q resistor is connected across the two rods at the bottom. What is the direction of the current through the aluminum bar? Aluminum bar

Figure P19.64 is a setup that can be used to measuremagnetic fields. A rectangular coil of wire contains N turnsand has a width w. The coil is attached to one arm of a balanceand is suspended between the poles of a magnet. The fieldis uniform and perpendicular to the plane of the coil. Thesystem is first balanced when the current in the coil is zero.When the switch is closed and the coil carries a current I, amass m must be added to the right side to balance the system.(a) Find an expression for the magnitude of the magneticfield and determine its direction. (b) Why is the result independentof the vertical dimension of the coil? (c) Supposethe coil has 50 turns and width of 5.0 cm. When the switch is closed, the coil carries a current of 0.30 A, and a mass of 20.0 gmust be added to the right side to balance the system. What isthe magnitude of the magnetic field?

A piece of copper wire has a resistance per unit length of 4.63 × 10/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.208 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coil. Number i Units >

An investigator has made a solenoid by wrapping 100 turns of wire on a tube that is 10 cm long and 2 cm in diameter. The power supply is providing as much current as it can, but a stronger field is needed, so the solenoid must be rewrapped. Which of the following will result in a stronger field?A. Wrapping 100 turns of wire on a tube that is 20 cm long and 2 cm in diameter.B. Wrapping 100 turns of wire on a tube that is 10 cm long and 1 cm in diameter.C. Wrapping 100 turns of wire on a tube that is 5 cm long and 2 cm in diameter.

Your camping buddy has an idea for a light to go inside your tent. He happens to have a powerful (and heavy!) horseshoe magnet that he bought at a surplus store. This magnet creates B = 0.30 T field between two pole tips 10 cm apart. His idea is to build a hand- cranked generator shown in Figure. He thinks you can make enough current to fully light a R = 1.0 N lightbulb rated at 4.0W. That's not super bright, but it should be plenty of light for routine activities in the tent. (Figure 1) Part A Find an expression for the induced current as a function of time if you turn the crank at freguency f. Assume that the semicircle has a radius of r = 5.0 cm and it is at its highest point at t = 0 s. Express your answer in terms of some or all of the variables B, R, r, f, t, and the constant T. Eν ΑΣΦ I = Submit Request Answer Part B With what frequency will you have to turn the crank for the maximum current to fully light the bulb? Express your answer to two significant figures and include the…

a.) A wire 4 m long has a mass of 224 g. The wire is connected to an emf. What is the minimum current in the wire that would allow it to levitate above the ground in a magnetic field of magnitude0.4 T? Round your answer to 2 decimal places b.) Per previous question, what direction must the current flow?

Let's take the Earth's magnetic field BE = 1.70 x 10-4 T pointing north. A metal cable attached to a space station stretches radially outward by 2.65 km. What would be the potential difference (AV) that develops between the ends of the cable if it travels westbound around Earth at 5.2 km/s? O 2.34 kV O 4.25 kV O 3.92 kV O 14.5 V

The superconducting magnet of an MRI scanner requires 810 A of current to create a magnetic field of 4.5 T in the center of its solenoid coil with a 0.65 m radius.    If the solenoid is 1.9 m long, how many loops of wire does it have?  N =