A generator is designed to produce maximum emf of 170 V while rotating with an angular speed of 3600 rpm. Each coil of the generator has an area of 2.0x10² m² Part A If the magnetic field used in the generator has a magnitude of 5.8x10-2 T, how many turns of wire are needed? Express your answer using two significant figures. ΕΞΑΣΦΑ

The magnetic field perpendicular to a single 16.7-cm-diameter circular loop of copper wire decreases uniformly from 0.570 T to zero. 1) If the wire is 2.75 mm in diameter, how much charge moves past a point in the coil during this operation? The resistivity of copper is 1.68×10−8Ω⋅m

A solenoid has 505 turns over a length of 0.54 m. What current will produce a magnetic field of 0.017 T within the solenoid? A

A 10.0-cm-long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.330 2. Pulling the wire at a steady speed of v = 4.00 m/s causes 3.50 W of power to be dissipated in the circuit. ▼ Part A How big is the pulling force? Express your answer with the appropriate units. F = Submit Part B B = A Value Submit μÀ Request Answer What is the strength of the magnetic field? Express your answer with the appropriate units. μA Value Units Request Answer 図]? Units ?

Q8.5 A circular plastic core is wrapped with a 22.0 m-long copper wire, with a diameter of 0.0200 mm and resistivity of 1.68×10-8 9-m, coiled 88 times, and its ends are linked to create a closed circuit. A magnetic field that increases at a constant rate of 12.0 mT/s, parallel to the coil's axis. Calculate the rate at which the wire produces thermal energy

A wire with a length of 3.5 m and a mass of 0.74 kg is in a region of space with a magnetic field of 0.76 T. Part A What is the minimum current needed to levitate the wire? Express your answer using two significant figures. νΠ ΑΣφ I = A

A 230-turn solenoid having a length of 31 cm and a diameter of 8.1 cm carries a current of 0.40 A. Calculate the magnitude of the magnetic field inside the solenoid. Number i Units

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?

A circular loop of wire of radius 16.0 cm is in a magnetic field of 4.50 · 10−3 T directedout of the page. The loop is stretched to make it long and thin, with no area betweenthe wires. The stretching takes 0.850 s. What are the magnitude and direction of theinduced emf in the loop while the loop is being stretched? Explain how you found thedirection, briefly giving all the steps of your thinking.

A generator has a peak voltage of 257 V and its coil with 500 turns and a diameter of 5.18 cm rotates in a 0.226 T field. At what frequency, in rpm, is the generator operating?