A 50-Cm Wire Placed in an East-West Direction Is Moved
A 50-cm wire placed in an east-west direction is moved horizontally to the north with a speed of
2)0 m/s. The horizontal component of the earth's magnetic field at that location is 25 μT toward the north and the vertical component is 50μT downward.What is the emf induced between the ends of the wire?
A) 10 µV
B) 20 µV
C) 30 µV
D) 40 µV
E) 50 µV
For a long ideal solenoid having a circular cross-section,the magnetic field strength within the solenoid is given by the equation B(t)= 5.0t T,where t is time in seconds.If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid,find the radius of the solenoid.
A) 0.30 m
B) 77 m
C) 0.94 m
D) 9.0 m
The coil in a 60-Hz ac generator has 125 turns,each having an area of 3.0 × 10-2 m2 and is rotated in a uniform 0.12-T magnetic field.What is the peak output voltage of this generator?
A) 170 V
B) 120 V
C) 200 V
D) 110 V
E) 220 V
Suppose that you wish to construct a simple ac generator having an output of 12 V maximum when rotated at 60 Hz. A uniform magnetic field of 0.050 T is available. If the area of the rotating coil is
100 cm2,how many turns do you need?