A circular loop consisting of 150 turns of wire and a diameter of 8.2 cm is placed in a uniform magnetic field of 1.0 T that is at an angle of 25◦ to the plane of the loop. The magnetic field is reduced to zero in 0.12 s. What is the current induced in the loop during this time if the resistance of the loop is 20 Ω? [Answer: I = 0.14 A]

A circular loop consisting of 150 turns of wire and a diameter of 8.2 cm is placed in a uniform magnetic field of 1.0 T that is at an angle of 25◦ to the plane of the loop. The magnetic field is reduced to zero in 0.12 s. What is the current induced in the loop during this time if the resistance of the loop is 20 Ω? [Answer: I = 0.14 A]

Similar questions

Consider a thin rod of resistance R = 12.0 Ohm, mass m = 60.0 g and length L = 20.0 cm. It is free to slide without friction on a vertical U-shaped wire. There is a uniform magnetic field of magnitude B = 1.20 T directed into the page, and the rod is stationary at t = 0 s.
The slide generator in the figure below is in a uniform magnetic field of magnitude 0.0500 T. The bar of length 0.340 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 ✕ 10−8 Ω · m and a cross-sectional area of 9.00 ✕ 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.)
A coil has a radius of .351 m and 500 turns. From an original orientation with its plane perpendicular to the direction of a uniform magnetic field, the coil is rotated 1/4 of a revolution in 4.21 ms. Find the magnitude in Tesla, of the magnetic field strength required to induce an average emf of 9.53 kV.
A ten-loop coil having an area of 0.23 m² and a very large resistance is in a 0.047-T uniform magnetic field oriented so that the maximum flux goes through the coil. The coil is then rotated so that the flux through it goes to zero in 0.34 s. What is the magnitude of the average emf induced in the coil during the 0.34 s? [Give your result in units of V.]
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 7.00 diameter loop with a resistance of 0.700 Ω is in an increasing magnetic field of 1.20 T/s as shown in the image. What is the magnitude and direction of the induced current? 6.41 A, clockwise 0.00660 A, counterclockwise 6.41 A, counterclockwise 0.00660 A, clockwise
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2 T in a time of 0.21 s. If the diameter of the band is 5.2 cm and the field is at an angle of 59° with the plane of the metal band while the hand is in the field, find the magnitude of the average emf induced in the band. 0.0061 V 1.0417 V 0.0417 V 0.0104 V
Problem 7: Part (a) Express the current induced in the loop, I, in terms of ε and R. I = ______ Part (b) Calculate the value of I, in amperes. I = ______
A generator is designed to produce a maximum emf of 190 V while rotating with an angular speed of 3600 rpm . Each coil of the generator has an area of 1.8×10−2 m2 . If the magnetic field used in the generator has a magnitude of 4.3×10−2 T , how many turns of wire are needed? Express your answer using two significant figures.
A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90°, so that the normal becomes perpendicular to the magnetic field. The coil has an area of 1.5 × 10-³ m², 50 turns, and a resistance of 1902. During the time while it is rotating, a charge of 6.7 × 10-5 C flows in the coil. What is the magnitude of the magnetic field? X
A square wire loop (side length 1.5 m) is oriented so that it is perpendicular to an external magnetic field B, with half the area of the loop embedded in the field, as shown below. The loop contains a battery with a constant emf Eb = 7.2 V and a resistor R = 3.2 Ω. The external magnetic field is B(t) = [0.027 T − (0.56 T/s) t] î where î is out of the page. (a) Findtheemfproducedbyinductionintheloop. (b) Findthenetcurrentintheloopfromboththeinducedemfandthebattery. (c) What direction is the current in? (a) Findtheemfproducedbyinductionintheloop. (b) Findthenetcurrentintheloopfromboththeinducedemfandthebattery. (c) What direction is the current in? (a) Find the emf produced by induction in the loop. (b) Find the net current in the loop from both the induced emf and the battery. (c) What direction is the current in?
You wish to construct a solenoid with a diameter of 2.00 cm that will produce a magnetic field of 3.40 x 10-2T at its center when a current of 12.0 A is passing through the coils. You want the resistance of the coil wire to be 5.80 N. The resistivity of the wire used is 1.70 x 10-8 N •m (at 20.0°C), and you are using a wire that has a cross sectional area of 3.14 × 10-8 m2. (Note that this solenoid may not necessarily be so tightly wound that the adjacent loops of wire will touch each other. Nonetheless, you may assume that it behaves like an ideal solenoid.) Determine the following. (a) number of turns needed on the solenoid turns (b) length of the solenoid