4. Two wires carry currents in the directions shown. Both currents are initially equal and are increasing in strength at the same rate. In this situation, what is the direction of the induced current in the loop? 12
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- 8. The straight wire carries a current I. In which direction (clockwise or counterclockwise) does the loop carry an induced current when I increases?18. If you have circular wire with a current I, and you in- crease I via external means, is there an induced current in the loop separate from the externally applied increase in I? A. B. C. Yes No Maybe, there's not enough information to tell2. A flat, circular coil has radius 10.0 cm and 200 turns. It is immersed in a uniform magnetic field that makes an angle of 60.0 degrees with the plane of the coil as shown below. The magnetic field is increasing with time at a rate of 12.0 T/s. What is the magnitude of the emf induced in the coil (in V)? (A) 65.3 (B) 100 (C) 133 (D) 76.8 (E) 49.8 (F) 30.0 unour em to the
- 6. Two concentric circular loops of wire lie on a table top with one inside the other as shown below. The current in the outer loop is clockwise and decreasing (di/dt < 0). What is the direction of the induced emf and induced current in the inner loop? i, di olt (A) clockwise (B) counterclockwise1. A flat circular coil with 95 turns, a radius of 4.20 × 10−² m, and a resistance of 0.430 is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of AB/At = 0.787 T/s. Find the induced current in the coil. ANow the switch on the electromagnet is reopened. The magnitude of the external magnetic flux through the wire loop ______ (A. increases, B. decreases, C. remains constant), and there is _______ (A. zero, B. a clockwise, C. a counterclockwise) current induced in the loop (as seen from the left.