College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A flat circular loop of radius 0.10 cm is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are perpendicular. O T. m^2 0.000000628 T. m^2 0.0063 T. m^2 0.0055 T. m^2arrow_forwardB. C. D. 7. An ideal solenoid with 100 turns has a radius of 0.020 m and is 70 cm long. If this solenoid carries a current of 10 A, what is the magnitude of the magnetic field at the center of the solenoid? (μ0 = 4 x 10-7 T m/A) A. 2.4 mT B. 4.9 mT E. C. 1.8 mT 8. A resistance of 100 , a capacitor of capacitive reactance 20 S2, and an inductor of inductive reactance 75 2 are connected in series to a 110-V rms and 60-Hz power source. What rms current flows in this circuit? A. 0.96 A B. 0.50 A 9. A bar of length 0.30 m slides without friction along current-carrying rails in a magnetic field of 0.54 T. Find the magnetic force on the bar if the bar carries a 4.00 A current. A. Zero 0.65 N 1.23 N B 1.67 N 2.16 N D. 6.0 mT C. 4.25 A D. 1.93 Aarrow_forwardA 10 cm diameter circular loop of wire is in a 5.00 -T magnetic field. It is removed from the field in 0.10 s. What is the average induced EMF? A. 3.92 V C. 0 B. 0.392 V D. 39.2 Varrow_forward
- A uniform magnetic field of 10 x10 I passes through a single loop rectangular coil of dimensions of 3.3 m by 6.6 m which makes 4.8° angle with the area vector of the coil. Calculate magnetic flux of the coil in Wb/m2? a. 0.340747 b. 0.217800 O c. 217.036145 O d. 0.217036 56 Larrow_forwardSuppose you wish to produce a 2-T magnetic field in a toroid with an iron core for which magnetic susceptibility is x = 6 x 10°. The toroid has a mean radius of 11 cm and is wound with 350 turns. Hint a. What current is required to produce this magnetic field in the iron core? Current of A is needed. b. For comparison, what current is required to produce the same magnetic field in an air-filled toroid of same geometry? Current of A is needed for toroid with no iron core. While it is not always practical to have region of magnetic field filled with ferromagnetic materials, this dramatic increase in strength of magnetic field produced is useful in some applications you will see in upcoming chapters.arrow_forwardSome consumer groups urge pregnant women not to use electric blankets, in case there is a health risk from the magnetic fields from the approximately 1 A current in the heater wires.a. Estimate, stating any assumptions you make, the magnetic field strength a fetus might experience. What percentage of the earth’s magnetic field is this?b. It is becoming standard practice to make electric blankets with minimal external magnetic field. Each wire is paired with another wire that carries current in the opposite direction. How does this reduce the external magnetic field?arrow_forward
- 1. a. What will be the direction of the current in the wire just above the bar magnet when you close the circuit? ___________ b.. What direction is the B field at the location of the wire due to the bar magnet? (Assume the N pole is the top end of the bar magnet.) _____________ c.. What does the right-hand-rule predict for the direction of the force on the wire? ______________arrow_forwardAn electric field of 4.0 mV/m is induced at a point 2.0 cm from the axis of a long solenoid (radius = 3.0 cm, 800 turns/m). At what rate is the current in the solenoid changing at this instant? a. 0.40 A/s b. 0.60 A/s c. 0.50 A/s d. 0.70 A/s e. 0.27 A/sarrow_forward2. A 22 cm by 35 cm rectangular coil has a single turn and carries a current of 1.4 A. Initially the plane of the coil is perpendicular to a uniform 1.6 T magnetic field, as shown in the picture O below. The resistance of the coil is negligible. a. Please determine the direction and the magnitude of the magnetic force on the right side of the coil. b. If the coil rotates a 30° angle as shown in the picture 2, please determine the direction and the magnitude of the magnetic torque on the left side of the coil. Axis B x x x xi x 22.0 cm 35.0 cm 30° x Barrow_forward
- A circular loop with a radius of 2.5 m rests horizontally inside a uniform magnetic field of 0.9 T in a down direction. What is the induced emf when the magnetic field drops to zero in 0.75 s? O a. 9.40 V O b. 23.6 V O c. 34.2 V O d. 17.5 Varrow_forwardA 65 turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.30 T field, starting with the normal of the plane of the coil perpendicular to the field. Assume that the positive max emf is reached first. a. What (in V) is the peak emf? b. At what time (in s) is the peak emf first reached? c. At what time (in s) is the emf first at its most negative? d. What is the period (in s) of the AC voltage output?arrow_forwardA coil of wire with 3 turns is attached to a 5 Ohm resistor and is oriented perpendicular to a uniform magnetic field as shown. At a particular instant, the magnitude of the magnetic field is 0.5 Tesla and is increasing at a rate of 0.2 Tesla/second. The area of each turn in the coil is 0.1 m?. What is the magnitude of the current through the resistor? A. 0.030 A В. 0.012 A B (increasing) 0.010 A D. 0.006 A Е. 0.004 A 52arrow_forward
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