The current in the straight wire is decreasing. Which statement is true? 1. There is a clockwise induced current in the loop. There is no induced current in the loop. There is a counterclockwise induced current in the loop.
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- 3. A loop of wire in the shape of a rectangle of width w and length L and a long, straight wire carrying a current I lie on a tabletop (see diagram). a) Suppose the current is changing with time according to I = a + bt where a and b are constants. Determine the emf that is induced in the loop if b = 10 A/s; h =1cm; w=10cm; and L= 1.0 m. b) What is the direction of the induced current in the rectangle?A 2.5 cm radius single circular wire coil is removed from a 4.5 x 10 T magnetic field in 0.25 s. What is the EMF induced in the coil? Select one: a. -3.5 x 10-V b. -2.2 x 10-7 V C. -2.8 x 10-V d. -1.1 x 10VIn the circuit shown, the switch S is closed at time t=0. a) Find the current in the 100 2 resistor immediately after the switch is closed. b) Find the current in the 10 fesistor immediately after the switch is closed. c) Find the current I in the inductor at the switch has been closed. T is a very long time after the switch has been closed
- 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 RCE1 The induced e.mf in a circuit always oppose the decay or growth of magnetic flux. This statement is called * O Faradays law Lenz law O Ohms law Compton effect25. A long, straight wire is in the same plane as a rectangular, conducting loop. The wire carries a constant current I as shown in the figure. Which one of the following statements is true? A. There will be no induced current. B. There will be a clockwise induced current in the loop. C. There will be a counterclockwise induced current in the loop. I
- A voltage generated by moving a magnet in a coil of wire is called "induced voltage." True O FalseA. Find the current in the loop at t = 1.5 s. B. Find the current in the loop at t = 2.5 s.8. In the circuit below, the switch is initially at position a (battery) for a long time. At t = 0 second, the switch is moved to position b. What is the magnetic energy of the inductor at t = 0.02 s? 0.1 Ω . 10-3 H m bo a 10 V
- 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 mHIn the figure, a 140-turn coil of radius 3.3 cm and resistance 6.9 Q is coaxial with a solenoid of 240 turns/cm and diameter 4.1 cm. The solenoid current drops from 1.7 A to zero in time interval At = 28 ms. What current is induced in amperes in the coil during At? Coil Solenoid Number i Units8. The straight wire carries a current I. In which direction (clockwise or counterclockwise) does the loop carry an induced current when I increases?