(10pts) A coil with 500 turns of cross-sectional area 2 m2 rotates at 60 Hz in...
A coil of 255 turns and area 0.500 m2 rotates in a uniform magnetic field B = 0.350 T such that the angle between the magnetic field and the area vector is given by φ(t) = 6.50t rad. If the coil starts from rest at t = 0, what is the magnitude of the emf induced in the coil at t = 25.8 s?
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 circular coil of wire 50 turns and a cross sectional area of 10.0 cm^2 carries a current of 4.0 A.It is placed in a magnetic field of 2.0 T with the coil making an angle of 60 degrees with the magnetic field. What is the torque exerted on the coil by the field? A) 0.70 N*m B) 0.20 N*m C) 0.80 N*m D) 0.40 N*m E) 0.35 N*m (I got 0.80 N*m,but I feel like I did something wrong...
A strong electromagnet produces a uniform magnetic field of 1.60 T over a cross-sectional area of 0.150 m2. A coil having 240 turns and a total resistance of 19.0 12 is placed around the electromagnet. The current in the electromagnet is then smoothly reduced until it reaches zero in 20.0 ms. What is the current induced in the coil?
A strong electromagnet produces a uniform magnetic field of 1.60 T over a cross-sectional area of 0.190 m2. A coil having 240 turns and a total resistance of 19.0 Ω is placed around the electromagnet. The current in the electromagnet is then smoothly reduced until it reaches zero in 20.0 ms. What is the current induced in the coil?
The coil of an electric generator rotates at a frequency of 60.0 Hz and develops an emf of 120 V. The coil has an area of 0.0030 m^2 and consists of 500 turns. Find the magnitude of the magnetic field in which the coil rotates. Answer: 0.30 T
1. A coil has 400 turns and an area of 0.2 m2. It flips from vertical to horizontal position in a time of 0.7 s in a uniform magnetic field of 3mT. Find the induced emf? 2. How many loops of wire are necessary to give a magnetic field of 3.2x 10-3 T at the center of a circular current loop carrying a current of 15.0 A, if the radius of the loop is 8.00 cm? 3. An electron(q= 1.60217662...
The coil shown in the figure has a resistance of 3.0 ?, 2 turns,
a cross-sectional area of 0.20 m^2, and a field (parallel to the
axis of the coil) with a magnitude given by B(t) = (4.0 + 3.0t^?2)
T, where t is in s. What is the value of the induced current in the
wire at t=3.5 s? Does this current flow from point A to point B or
from point B to point A through the resistor?...
20) A coil having 20 turns and an area of 0.04 m2 rotates at 10 rev 5-1 in a magnetic field of 0.02 T. The resistance of the coil is 2 and its self-inductance is 1 mH. The induced emf is: a) 0.38n sin(10mt) b) 0.28n sin(20nt) c) 0.38n sin(20ft) d) 0.28+ sin(10xt) e) none
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...