A coil 4.40 cm in radius, containing 460 turns, is placed in a uniform magnetic field that varies with time according to B=( 1.20x10-2 T/s )t+(2.95x10-5 T/s¹ )t¹. The coil is connected to a 680 2 resistor, and its plane is perpendicular to the magnetic field. You can ignore the resistance of the coil.

Q6- Calculate the value of the current I needed to setup a flux of 0.1 mwb in the airgap. The magnetic circuit is laminated with 9.92 iron factor and μ-1000. The magnetic circuit has uniform cross section area of 15 Cm². 2 mm 30 Cm 1000 turns 2 Cm 750 turns 2 Cm +0.5 A 161 2 mm

A coil is placed along y-axis and moving with a velocity of 2i+6j-7k m/s. It is 1200mm long and cutting the magnetic flux, B = 2i+j+4k T. Determine the magnitude and the polarity of the induced voltage in the coil. Show your complete work.

A coil with circular cross section and 20 turns is rotating at a rate of 400 rpm between the poles of a magnet. If the magnetic field strength is 0.6 T and peak voltage is 0.2 V, what is the radius of the coil? If the emf of the coil is zero at t = 0 s, when will it reach its peak emf?

For the series RL circuit shown in the figure below, answer the following questions and justify your answer.If the current is kept constant, does the coil have inductance?If the current is kept constant, does the coil affect the current value?Can the reverse emf ever be greater than the battery emf?

What is the induced potential difference at t=2s?

The magnetic circuit shown below has mean magnetic path of 0.5 m, a relative permeability of 1000, and a uniform cross sectional area equal to 5×104 m². The coil has 120 turns and, when connected to a 120 v, 60 Hz voltage source, draws 5 A. Determine the inductance of the coil in Henry. Give your answers correct to 3 decimal places. Answer:

Four current carrying wires are arranged in the corners of a square as shown in the picture. The magnetic field in the center of the square is directed towards: N W X (x) O The north OB is zero O The west I O The south O The east S E

Inductance