9. What would be the implication if your curled fingers have the same direction with the induced current or emf in the circuit? A. Positive I and EMF C. Negative I and EMF 10. Based on the following statements, which is incorrect about the sign of the induced emf or B. No implication was given D. Both A and B current? I. If the flux is increasing, so II. If the flux is decreasing, is positive, then the induced emf or current is negative a is negative and the induced emf or current is positive * is negative and the induced emf or current is negatives C. II III. If the flux is increasing, А. I 11. Which of the following is a nonconservative field where it does network in moving a charge over a closed path? A. Magnetic field C. Induced emf B. II D. I and II B. Electrostatic electric field D. Induced Electric field

9. What would be the implication if your curled fingers have the same direction with the induced current or emf in the circuit? A. Positive I and EMF C. Negative I and EMF 10. Based on the following statements, which is incorrect about the sign of the induced emf or B. No implication was given D. Both A and B current? I. If the flux is increasing, so II. If the flux is decreasing, is positive, then the induced emf or current is negative a is negative and the induced emf or current is positive * is negative and the induced emf or current is negatives C. II III. If the flux is increasing, А. I 11. Which of the following is a nonconservative field where it does network in moving a charge over a closed path? A. Magnetic field C. Induced emf B. II D. I and II B. Electrostatic electric field D. Induced Electric field

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter7: Electricity

Section: Chapter Questions

Problem 27P: . The generator at a large power plant has an output of 1,000,000 kW at 24,000 V. (a) If it were a...

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. The generator at a large power plant has an output of 1,000,000 kW at 24,000 V. (a) If it were a DC generator, what would he the current in it? (b) What is its energy output each day—in joules and in kilowatt—hours? (c) If this energy is sold at a price of 10 cents per kilowatt-hour, how much revenue does the power plant generate each day?
(a) A jet airplane with a 75.0 m wingspan is flying at 280 m/s. What emf is induced between wing tips if the vertical component 01 the Earth’s field is 3.00105T ? (b) Is an emf of this magnitude likely to have any consequences? Explain.
c1. What is the magnitude of the induced emf at t = 0 s? c2. What is the magnitude of the induced emf after a long time has passed? d. After the current in the RL circuit has reached its final value (as in b2. above) the positions of the switches are reversed, with S1 open and S2.How long does it take for the current to reach a tenth of its initial value?
I.) A 1 m long conductor is moved in a field of density of 1 Wb/m^2 at velocity of 30 m/s. What is the emf induced if the motion is perpendicular to the field? a. 20 V b. 30 V c. 15 V d. 25 V
The figure shows a 10-cm-diameter loop in three different magnetic fields. The loop's resistance is 0.10 ΩΩ.(Figure 1) A. For case (a), what is the induced emf? In mV B. For case (a). what is the induced current? C. For case (a), what is the direction of the current? a. clockwise b. counterclockwise c. no current c. no current
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1. A 12V electric motor is turned on. When the motor is first started, the current is 1.0A. Once running, the current on the motor is 0.24A. a. What is the resistance of the motor? b. What is the running voltage for the motor? c. What is the back-EMF? 2. The length of the moving conductor L=0.25m (you may assume that this is the distance from “rail to rail”). The strength of the magnetic field is 0.25T. If you need 1.5V of induced emf to light the bulb, and the maximum distance the bar can move is 1m, how much time must the bar be moved?
A Transformer has 400 primary turns and 1800 secondary turns. The input voltage is 24V and the output current is 4A when connected across a load. a. What is the output voltage of the transformer? b. What is the resistance of the load? c. How much power is dissipated by the resistor?
A 90 mH inductor carries a current that varies with time according to… i(t) = t2+6t (in A with t in sec). Determine the magnitude of the voltage across the inductor at t = 4 seconds. a. 1.26 V b. 2.88 V c. 3.42 V d. 3.60 V
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