A small circular loop of wire of radius 5.0 cm and resistance R = 1.2 x 10-3 is centered inside a large circular loop of wire of radius 50 cm (see figure below). The larger loop, which initially carries a current I = 8.6 A, is cut and its current is reduced to zero over a time interval of 1.2 x 10-6 s. Find the average current in the smaller loop during this time interval. (The magnetic field of the larger loop is approximately constant over the smaller loop.) magnitude direction clockwise ←50 cm 10 cm ← Q

A coil with the radius of 20 cm has 10 turns and carries a current of 4 A. A charged particle whose charge equals 60 µ C moves at 1500 m/s through the center of the coil at an angle of 300 to the axis. Compute the magnitude of the force exerted on the particle.

There are two concentric tungsten wire loops; a 4 cm radius loop and a 33 cm radius loop. The cross-sectional area of each wire is 0.009 m2. The current in the larger loop goes from 0 A to a counterclockwise 9 A in 5.9  10-4 s. Find the voltage & current in the smaller loop during the stated time interval. Assume the B-field of the larger loop is uniform (though not constant) across the smaller loop. V = I =

The above figure shows the cross sections of two wires carrying equal magnitude currents of 10 A but in opposite direction (one is into the page, the other is out of the page). The wires are 0.5 m apart (d=0.5 m). Find the magnetic field at point P. Group of answer choices -16 µT upward -8 µT upward -4 µT upward -12 µT downward -14 µT downward

For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth’s field. The earth’s field is approximately 50 μT, but at any particular location it may be a bit more or less than this. A 1.00-m-diameter current loop with 200 turns of wire is adjusted to carry a current of 0.215 A; at this current, the coil’s field at the center is exactly equal to the earth’s field in magnitude but opposite in direction, so that the total field at the center of the coil is zero. What is the strength of the earth’s magnetic field at this location?

A conducting rod spans a gap of length L = 0.234 m and acts as the fourth side of a rectangular conducting loop, as shown in the figure. A constant magnetic field B = 0.35 T pointing into the paper is in the region. The rod is moving under an external force with an acceleration a = At2, where A = 2.5 m/s4. The resistance in the wire is R = 25 Ω.  Express the position of the rod, x, in terms of A and t. Assume x = 0 at t = 0.

A 227-turn circular coil of radius 24 cm is perpendicular to a uniform magnetic field of 0.55 T. During a 0.75 s time interval, this field increases to 1.7 T. If the resistance of the coil is 11.5 ohm, calculate the average emf and current that flows in the coil during this interval. The average emf, Emf = 47.23 V Units V The average current, i = 5.5 x Units A

The slide generator in the figure below is in a uniform magnetic field of magnitude 0.0500 T. The bar of length 0.345 m is pulled at a constant speed of 0.500 m/s. The U-shaped conductor and the bar have a resistivity of 2.75 x 10-8 · m and a cross-sectional area of 8.50 x 10-4 m². Find the current in the generator when x = 0.680 m. (Note that the A in the image below is the area of the loop, not the cross-sectional area of the conductor and bar.) 313600 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. A Bulb is unlit. A. B. Bulb is lit. loo F mech

A square coil of wire of side 2.35 cm is placed in a uniform magnetic field of magnitude 2.50 T directed into the page as in the figure shown below. The coil has 25.0 turns and a resistance of 0.780 . If the coil is rotated through an angle of 90.0° about the horizontal axis shown in 0.335 s, find the following. x xx x X X X xxx x xx x X Rotation axis (a) the magnitude of the average emf induced in the coil during this rotation mV (b) the average current induced in the coil during this rotation MA

A piece of copper wire has a resistance per unit length of 8.70 x 10 o/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.146 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 Units