20.
21.
22.
and attract the wires to each other.
20. A coil with 10 turns of area 0.05m is place in a magnetic field of...
Two parallel wires are separated by 1mm, Each is 2m long and carries a current of 3A in the same direction as the other. The forces the two wires exert on each other: a) Has magnitude 0.0036 N and repels the wires from each other. b) Has magnitude 0.0036 N and attract the wires to each other. c) Has magnitude 0.00015 N and repels the wires from each other. d) Has magnitude 0.00015 N and attract the wires to each...
21. Which of the following is a possible equation for the electric field of an electromagnetic wave with average intensity 0.00132W/m² traveling in the +z direction with a magnetic field along the x axis? a. E = (2 V/m) sin [(9.8 x 106/mz+ (2.9 x1015 Hz)t) i b. Ē = (1 V/m) sin [(9.8 x 106 /m) - (2.9 x1015 Hz)t]î E = (1 V/m) sin [(9.8 x 106 /m) - (2.9 x1015 Hz)t] il E = (2 V/m) sin...
Which of the following is a possible equation for the electric field of an electromagnetic wave with average intensity 0.00132W/m2 traveling in the +z direction with a magnetic field along the x axis? a. ?=(2 V/m) sin [(9.8x106 /m)z + (2.9x10^15 Hz)t] ?̂ b. ?=(1 V/m) sin [(9.8x106 /m)z - (2.9x10^15 Hz)t] ?̂ c. ?=(1 V/m) sin [(9.8x106 /m)z - (2.9x10^15 Hz)t] ?̂ d. ?=(2 V/m) sin [(9.8x106 /m)z + (2.9x10^15 Hz)t] ?̂ Which of the following is a possible...
A flat coil of wire consisting of 20 turns, each with an area of 10 cm, is positioned perpendicularly to a uniform magnetic field that varies with time according to B=2.5 f. where t is measured in s and B in T. If the coil has a total resistance of 0.10 9, what is the magnitude of the induced current at 0.8s? a. 0.20 A b. 0.60 A c. 0.50 A d. 0.80 A e. None of the above At what frequency...
The coil in a 60-Hz ad generator has 200 turns, each having an area of 4.5 x 102 mand is rotated in a uniform 0.42-T magnetic field. What is the peak output voltage of this generator? Select one: A. 1.42 KV B. 1.10 KV C. 1.20 KV D.2.0 KV E. 3.15 KV two long parallel wires carry currents of 20 A in the same directions. They are separated by 40 cm. What is the magnitude of the magnetic field in...
A circular coil (800 turns, radius = 0.040 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.028 s, the normal makes an angle of 45o with the field because the coil has made one-eighth of a revolution. An average emf of magnitude 0.094 V is induced in the coil. Find the magnitude of the magnetic field at the location of the...
coil with 22 turns sits in a magnetic field. The cross-sectional area of the coil is 9.6 cm2. If the magnetic field uniformly reduces from 11 T to 3.0 T in 6.0 seconds, what is the magnitude of the induced emf in that coil?
A coil rotating perpendicularly to a uniform magnetic field contains 290 turns and has an area per turn of 3.3 × 10-3 m2. The magnetic field is 0.15 T, and the current in the coil is 0.15 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The coefficient of static friction between the shaft and the brake shoe is 0.53. The radius of the shaft is 0.014 m. What is the magnitude of...
5 A coil its (radius : NIaPPed vith 300 tures of vire on the periacter of a circular frase 8.0 ca). Each turn has the s sane area, equal to that of the frane. A nifore piane of the coil. This field changes eagnetic field is turned on perpendicular to the at a constnt rate froe 20 to 80 T in a tise of 20 s What is the sagnitade of tme induced eal in the coil at the instant...
A generator uses a coil that has 60 turns and a 0.50-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that each turn of the coil is a square (an approximation), determine the length of the wire from which the coil is made.