a. Determine the magnitude of the emf in the square loop (square- wire) at t = 3 seconds. b. Determine the direction of induction in the square loop
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- 4 The circuit given to the right has been on for a long time. a. Determine the energy stored in the capacitor. 12 mH 16 k2 18 k2 15 V 1.5μF. 9k 2 b. Determine the energy stored in the inductor. c. Determine how high you could lift a 1.0mg object on Earth if you could convert all of the capacitor's and inductor's stored energy into gravitational potential energy.A transformer consists of 275 primary windings and 834 secondary windings. If the potential difference across the primary coil is 25.0 V. what is the voltage across the secondary coil? Is this a step up or step down transformer? Explain. What is the effective load resistance of the secondary coil if it is connected across a 125 Ω resistor ?In an ideal transformer, it is known that the primary coil has 200 turns and the secondary coil has 10 turns. A. If the secondary coil has voltage of 10 V what is the voltage in the primary coil? B. When we say that U.S AC voltage is 120 V what does this voltage refer to? Name the voltage.
- 4. Inductance of a long solenoid: A long thin solenoid has N turns, a length W, area A and a current I. a. What is the magnetic flux through one turn of the solenoid? 6 per turn = BA= b. Determine the inductance L of the solenoid. LI= NO. per turn c. A very long solenoid has 500 turns, a radius of 2 cm and a length of 40 cm and a current of 3A. What is the inductance of the solenoid? d. The coil in an inductor is usually wrapped around an iron core which amplifies the magnetic field. Assume the iron core makes the magnetic field 700 times larger than without the core. What is the inductance of the solenoid in (c) with the iron core? 600 # 212 RCE7. If the current flowing through the wires is given as i(t) = 1, sin(@t), find an expression for the emf, C, around the square loop denoting both the magnitude and the direction.006 In a model AC generator, a 485-turn rect- angular coil, 3.8 cm by 17 cm, rotates at 54 rev/min in a uniform magnetic field of 0.36 T.
- A 140 V emf is across a transformer's 190-turn primary coil. How many turns should the secondary have in order to produce a 40 V emf, expressed as an integer. Can you set up Es/Ep = Ns/Np. I know I am to solve for Ns. I need to see what is given tied to the symbols, then I see what to what better.When the current in a solenoid uniformly increases from 3.0 A to 8.0 A in a time 0.25 s, the induced EMF is 0.50 volts. What is the inductance of the solenoid? a. 25 mH b. 40 mH c. 30 mH d. 35 mH e. 20 mHA generator produces 21.0 V when turning at 890 rev/min. What emf does it produce when turning at 530 rev/min? V
- 15. A power generator produces 2.00 kA of current at 500 V. Electric power must be transmitted with 1.00% loss in transmission lines of 95.00 total resistance. To achieve this, the voltage is stepped up by a transformer with 32 turns in its primary coil. a. How much voltage is carried by the transmission lines? b. How many turns are in the transformer's secondary coil?2. An AC generator has 75 rectangular loops on its armature. Each loop is 14.0 cm long and 10.0 cm wide. The armature rotates at 1300 rpm about an axis parallel to the long side. If the loop rotates in a uniform magnetic field of 0.700 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator? Volts1. A generator is shown below. If the period of rotation of the spinning loop of wire is T, what is the fraction of a period between maximum magnetic flux and minimum induced emf? Magnetic Poles Magnetic Flux N Wire Loop (the conductor) Slip-rings. Carbon Brushes Axis of Rotation