A coil of 125 turns has an area 6.63 × 10-3m2 and has its plane perpendicular to a 75 X 10-3 T magnetic field produced by a nearby electromagnet. The current in the electromagnet is turned off leading the magnetic field to disappear and causing an average emf of 0.65 V to be induced in the coll. How much time does it take for the field to disappear in units of seconds?
Give your answer as a positive number
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A coil of 125 turns has an area 6.63 × 10-3m2 and has its plane perpendicular to a 75 X 10-3 T magnetic field
The area of a 120-turn coil oriented with it's plane perpendicular to a 0.20-T magnetic field is 0.050 m2. Find the average induced emf in this coil if the magnetic field reverses its direction in 0.34s.
The area of a 140 turn coil oriented with its plane perpendicular to a 0.17 T magnetic field is 6.9×10−2 m2 . Find the average induced emf in this coil if the magnetic field reverses its direction in 0.38 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 magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.61 V and a current of 3.2 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What emf and current are induced in...
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.26 V and a current of 4.9 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What (a) emf and (b) current are...
A generator is constructed by rotating a coil of N turns in a magnetic field B at a frequency f. The internal resistance of the coil is R and the cross sectional area of the coil is A. The average induced EMF doubles if the magnetic field B is doubled. The average induced EMF doubles if the area A is doubled. The average induced EMF doubles if the frequency f is doubled. The average induced EMF doubles if the resistance...
QUESTION 27 A circular coil of wire with radius 3 cm and 50 turns is placed in a uniform magnetic field of magnitude 0.4 T. The magnetic field is parallel to the area vector; l.e. perpendicular to the plane of the coll." a) What is the magnetic flux through the coll? b) The magnetic field is decreased to 0 in 0.1s. What is the magnitude of the emf induced in the coll during this time interval? c) If the coil...
A generator is constructed by rotating a coil of N turns in a magnetic field B at a frequency f. The internal resistance of the coil is R and the cross sectional area of the coil is A. True or False 1. The average induced EMF doubles if the resistance R is doubled 2. The average induced EMF doubles if the magnetic field B is doubled 3. The maximum induced EMF occurs when the coil is rotated about an axis...
You have a coil of wire with 20 turns each of 1.5 cmradius. You
place the plane of the coil perpendicular to a
0.48-TB? field produced by the poles
of an electromagnet as shown in the figure (Figure 1) . Find the
magnitude of the average induced emf in the coil when the magnet is
turned off and the field decreases to 0 T in 2.6 s . (Answer is not
1.13x10^-3 V)
A plane loop of wire of area 14cm2 with two turns is perpendicular to a magnetic field whose magnitude decays in time according to B= (0.5 T)e-t/7. What is the induced EMF as a function of time?