An electric generator consists of 100 turns of wire formed into a rectangualar loop 40.0 cm by 20.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T. 1 R What is the maximum value of the emf produced when the loop is spun at 1100 rev/min about an axis perpendicular to B?
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- A circular copper disk of radius 7.5 cm rotates at 2400 rpm around the axis through its center and perpendicular to its face. The disk is in a uniform magnetic field B → of strength 1.2 T that is directed along the axis. What isthe potential difference between the rim and the axis of the disk?A 65.1-cm-diameter coil consists of 20 turns of circular copper wire 8.67 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 5.358E-3 T/s. Determine the current in the loop, in A.An electric generator contains a coil of 100 turns of wire, each forming a rectangular loop 50.0 cm by 30.0 cm. The coil is placed entirely in a uniform magnetic field with magnitude B = 3.50 T and initially perpendicular to the coil's plane. What is the maximum value of the emf produced when the coil is spun at 1000 rev/min about an axis perpendicular to B? Give your answer in kV.
- Two moving rods of equal lengths (1.20 m) are moving as shown in the figure. The speed v1 = 1.10 m/s and the speed v2 = 2.00 m/s. If the magnetic field is uniform with a magnitude of 0.60 T, what is the magnitude of the average emf in the loop?Chapter 30, Problem 015 GO A square wire loop with 2.4 m sides is perpendicular to a uniform magnetic field, with half the area of the loop in the field as shown in the figure. The loop contains an ideal battery with emf 8 = 23 V. If the magnitude of the field varies with time according to B = 0.050 - 0.83 t, with B in teslas and t in seconds, what are (a) the net emf in the circuit and (b) the direction of the (net) current around the loop? B & batAs a diligent physics student, you carry out physics experiments at every opportunity. At this opportunity, you carry a 1.27 m long rod as you jog at 3.17 m/s, holding the rod perpendicular to your direction of motion. What is the magnitude ?B of the magnetic field that is perpendicular to both the rod and your direction of motion and that induces an EMF of 0.301 mV across the rod? Express the answer in milliteslas.
- A 19-turn circular coil of wire has diameter 0.91 m. It is placed with its axis along the direction of the Earth's magnetic field of 51.0 µT and then in 0.200 s is flipped 180\deg. An average emf of what magnitude is generated in the coil? mVA 17.0 m long, thin, uniform iron bar slides north at a speed of 28.0 m/s. The length of the bar maintains an east-west orientation while sliding. The vertical component of the Earth's magnetic field at this location has a magnitude of 38.0 µT. What is the magnitude of the induced emf between the ends of the bar (in mV)? Hints: Area swept by the loop while sliding = area of the rectangle of width W A = dxt = 17vxt d(BA) and EMF (V) dtA circular coil enclosing an area of 160 cm² is arranged horizontally. The coil has 210 turns of copper wire. The wire making up the coil has resistance of 3.00 2, and the ends of the wire are connected to form a closed circuit. Initially, a 2.00-mT uniform magnetic field points perpendicularly upward through the plane of the coil. The direction of the field then reverses so that the final magnetic field has a magnitude of 3.10-mT and points downward through the coil. If the time required for the field to reverse directions is 0.750 s, determine the magnitude of the average current in the coil during that time. Bi Initial Bf ↓↓↓↓ Final
- A 40 turn circular col radius = 4.0 cm, total resistance = 020 0) is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as given by B = 22 sin(10 nt) mT where tis measured ins. What is the magnitude of the induced current in the coil at 0.07 s7 O a 041 A O b.0.71 A O .0.35 A O d.0.56 A O eOATime left 1:15:1 A 40 turn circular coil (radius = 4.0 cm, total resistance = 0.20 0) is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as given by B 95 sin(10 Tt) mT where t is measured in s. What is the magnitude of the induced current in the coil at 0.07 s? O a. 1.76 A O b. 3.05 A O c. 1.49 A O d. 2.42 A e. 0 A Next page Introduction to Phys102An electric generator contains a coil of 100 turns of wire, each forming a rectangular loop 50.0 cm by 30.0 cm. The coil is placed entirely in a magnetic field with magnitude B = 3.50 T and with B initially perpendicular to the coil’s plane. What is the maximum value of the emf produced when the coil is spun at 1000 rev/min about an axis perpendicular to B?