A circular loop of wire with a radius of 4.0 cm is in a uniform magnetic field of magnitude 0.060 T. The plane of the loop is perpendicular to the direction of the magnetic field. In a time interval of 0.50 s. the magnetic field changes to the opposite direction with a magnitude of 0.040 T. What is the magnitude of the average emf induced in the loop? (a) 0.20 V (b) 0.025 V (c) 5.0 mV (d) 1.0 mV (e) 0.20 mV

The face of a loop with a radius of 3 centimeters is perpendicular to a magnetic field that increases in magnitude from zero to 0.10 Tesla in 1 millisecond. What is the magnitude of the induced emf in the loop? If you look at the loop with the magnetic field facing you, in which direction (clockwise or counterclockwise) does the current flow around the loop?

Suppose you have a long, skinny conductor that is oriented with its long axis parallel to a uniform magnetic field. Suppose also that the conductor is moving along its long axis in a straight line at constant velocity v. Despite the motion of the conductor, no motional emf is induced. Why? The magnetic field is too uniform The velocity has no component normal to the magnetic field The velocity is too low The conductor is so long and so thin that its electrical resistance is too high

A single coil of wire, with a radius of 0.17 m is rotated in a uniform magnetic field such that the angle between the field vector and the area vector obeys 0 = wt. 1.26 s? If the strength of the field is 3.492 T, and the angular frequency is 545.1 rad/s, what is the induced emf in the loop at t = 0.05188 V

A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2 T in a time of 0.21 s. If the diameter of the band is 5.2 cm and the field is at an angle of 59° with the plane of the metal band while the hand is in the field, find the magnitude of the average emf induced in the band. 0.0061 V 1.0417 V 0.0417 V 0.0104 V

A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90°, so that the normal becomes perpendicular to the magnetic field. The coil has an area of 1.5 × 10-³ m², 50 turns, and a resistance of 1902. During the time while it is rotating, a charge of 6.7 × 10-5 C flows in the coil. What is the magnitude of the magnetic field? X

A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the figure) whose strength is given by B = (1/4) sin(t/2) T, where t is in seconds. If the radius of the loop is r = 4m, what is the maximum magnitude of the EMF in the loop? At what time is the magnitude of the EMF at half its max value?

A flat coil of wire consisting of 15 turns, each with an area of 53 cm², is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 3 T to 8 T in 3.4 s. If the coil has a total resistance of 0.3 ohms, what is the magnitude of the induced current in amperes?

A flat loop of wire consisting of a single turn of cross- sectional area 0.01 m^2 is perpendicular to a magnetic field that increases uniformly in magnitude from 2T to 8T in 3s. What is the EMF in the loop?

A single loop of copper wire, lying flat in a plane, has an area of 7.20 cm2 and a resistance of 1.80 N. A uniform magnetic field points perpendicular to the plane of the loop. The field initially has a magnitude of 0.500 T, and the magnitude increases linearly to 1.50 T in a time of 1.12 s. What is the induced current (in mA) in the loop of wire over this time? 3.57 You may have neglected to convert units. Be sure to convert the area from cm2 to m2. Then, convert the current from A to mA. mA Need Help? Read It