Two solenoids are made of a total of 2000 turns of copper wire. Solenoid I is 2

Question

Two solenoids are made of a total of 2000 turns of copper wire. Solenoid I is 2 m long. While solenoid II is 1 m long. When equal currents are present in the two solenoid I to the magnetic field B_11 along the axis of solenoid II, B_y/B is. A. 4 B 2 C. 1 D. 1/2 E. 1/4 A square loop of wire lies in the plane of the page. A uniform constant magnetic field is directed into the page When the square loop just starts to route about the axis as shown The induced current in the loop is A. Zero B. Clockwise C. Counterclockwise D. Clockwise in two of the loop sides and counterclockwise in the other two E. None of above The diagram show five possible orientations of a magnetic dipole in a uniform magnetic field B. Far which of these orientations is the magnetic torque the largest? A rectangular loop of wire is placed perpendicular to a uniform magnetic field and then spun around one of its sides at frequency f. The induced emf is a maximum when: A. the flux is half its maximum value B. the flux is a maximum C. the flux is zero D. the derivative of the flux with respect to time is zero E. None of the above

Explanation / Answer

5) D) 1/2

BI = mue*N*I/L1

BII = mue*N*I/L2

BI/BII = L2/L1

= 1/2

6) B. clockwise

7) A

8) C) the flux is zero.

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