Inner coil, radius R2 with N2 turns measure voltage Outer coil, radius R1 with N1 turns, AI/At = 5 amps/second We make a simple metal detector out of two circular coils of wire. The inner coil (radius R2, number of turns N2) is much much smaller than the outer coil (radius R1, number of turns N1), so you can assume the magnetic field is constant over the inner coil. We drive the outer coil with a current that increases at 5 amps/second. If there is no metal around, how much voltage is induced on the inner coil and how do you know? 1.

Chapter 30, Concept Question 04 The figure shows two circuits in which a conducting bar is slid at the same speed v through the same uniform magnetic field and along a U- shaped wire. The parallel lengths of the wire are separated by 24 in circuit 1 and by L in circuit 2. The current induced in circuit 1 is counterclockwise. e (2) Is the magnetic field into or out of the page? Into Out of Is the current induced in circuit 2 clockwise or counterclockwise? Counterclockwise Clockwise Is the emf induced in circuit 1 larger than, smaller than, or the same as that in circuit 2? Larger The same as Smaller

QUESTION 1 A coil of ten turns of area 0.01 m2 and resistance 5 Q is placed perpendicularly inside a magnetic field whose intensity and direction changes as given in the figure. What is the magnitude of the flux of magnetic field crossing the area of the coil at time = 6 sec? B(T) 0.1 0.3 0.5 0.8 0.9 t(s) -1 -2 O 2 Wb O 0.2 Wb O 20 Wb O 0.02 Wb O none of these

The magnetic field at the center of a solenoid L = 75 cm long is B = 0.11 T when a current of I = 3.5 A flows through the solenoid wire.   1. Solve the formula for the magnetic field near the center of a long, tightly wound solenoid for the number of turns, N, in the solenoid. The expression should be in terms of the given variables.  2.  Calculate the value of the number of turns, N.