An elastic conducting material is stretched into a circular pop of 15.9 cm radius. It is placed with its plane perpendicular to a uniform 0.646 T magnetic field. When released, the radius of the loop starts to shrink at an instantaneous rate of 89.2 cm/s. What emf is induced in volts in the loop at that instant? Number Units V
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- A certain elastic conducting material is stretched into a circular loop of 5.7 cm radius. It is placed with its plane perpendicular to a uniform 1.0 T magnetic field. When released, the radius of the loop starts to shrink at an instantaneous rate of 75.0cm/s. What emf is induced in the loop at that instant in units of V?The figure below displays a circular loop of aluminum wire in a uniform magnetic field pointing into the page. The radius of the loop is 11.0 cm and the magnitude of the field is 0.120 T. You grab points A and B and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.210 s to do so. What is the magnitude of the average induced emf in the loop (in mV) during this time? X * * * X * * mV X x XÓT X A X *3** B X X x x X x X X xA circular loop of wire has its radius shrink from 3 m to 1.5 m over 5 seconds. The area vector of the wire stays parallel with a magnetic field of magnitude 4 μT. What is the induced emf? 0 V 3.77e-6 V 0.94 V 1.70e-5 V
- The flexible loop in the figure below has a radius of 11.0 cm and is in a magnetic field of magnitude 0.170 T. The loop is grasped at points A and B and stretched until its area is nearly zero. If it takes 0.190 s to close the loop, what is the magnitude of the average induced emf in it during this time interval? mV X x X X X x X x X x X A X X X B x Xx X X x X x X x X XA planar coil of wire has a single turn. The normal to this coil is parallel to a uniform and constant (in time) magnetic field of 1.80 T. An emf that has a magnitude of 2.40 V is induced in this coil because the coil's area A is shrinking. What is the magnitude of AA/At, which is the rate (in m²/s) at which the area changes? Number i UnitsA coil of wire with 50 turns lies in the plane of the page and has an initial area of 0.310 m2. The coil is now stretched to have no area in 0.100 s. What is the magnitude and direction of the average value of the induced emf if the uniform magnetic field points into the page and has a strength of 1.25 T? Magnitude? ___ V Direction?
- The figure below displays a circular loop of nickel wire in a uniform magnetic field pointing into the page. The radius of the loop is 11.0 cm and the magnitude of the field is 0.140 T. You grab points A and B and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.190 s to do so. What is the magnitude of the average induced emf in the loop (in mV) during this time? x X X X x mV X x x x x x A Ax x x x 90x B x x x x X x x X xA generator has a coil with 1260 turns that are each 0.020 m in diameter. The coil rotates at 3600 rpm in a 0.670 T magnetic field. If a 20.0 Ω resistive load is connected in parallel with the generator, what is the average power used by the load? ____ WA 2.00×10-2 Ω square wire loop 40.0 cm on a side has its plane normal to a uniform magnetic field of magnitude B = 3.0 T. If you pull two opposite sides of the loop away from each other, the other two sides automatically draw toward each other, reducing the area enclosed by the loop.If the area is reduced to zero in a time of 0.30 s what is the average emf during this time interval? What is the average current during this time interval?
- A circular loop in the plane of a paper lies in a 0.65 T magnetic field pointing into the paper. The loop's diameter changes from 21.5 cm to 6.8 cm in 0.52 s . What is the magnitude of the average induced emf?A circular wire coil with 25 turns and radius 1.02 cm is placed in a uniform magnetic field of strength 6.04 T, directed perpendicular to the plane of the wire loops. Over a period of 1.85 s, the magnetic field fades away to zero. What is the average induced emf (voltage) in the coil over this period of time? 0.016 V 0.035 V 0.043 V 0.027 VAn emf is induced by rotating a 1090 turn, 20.0 cm diameter coil in the Earth's 4.80 × 10¬ I magnetic field. What average emf (in V) is induced, given the plane of the coil is originally perpendicular to the Earth's field and is rotated to be parallel to the field in 10.0 ms? V