Dependence on Area and Orientation
Trending Questions
Q. A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced emf is
- Twice per revolution
- Once per revolution
- Four times per revolution
- Six times per revolution
Q. A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0×10–5 T with its plane perpendicular to the field initially. It is rotated at constant angular speed about an axis along the diameter of the coil and perpendicular to the magnetic field so that it undergoes half of the rotation in 0.2 s. The maximum value of EMF induced (in μV) in the coil will be close to the integer
Q. A rectangular, square, circle and elliptical loop, all in xy− plane, are moving out of a uniform magnetic field with a constant velocity V=v^i. The magnetic field is directed along negative z− axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for
- any of the four loops
- the rectangular, circular & elliptical loops.
- the circular and elliptical loops
- only the elliptical loop
Q. The figure shows a conducting loop being pulled out of a uniform magnetic field with a constant speed v. Which of the four plots, shown in the figure, may represent the power delivered by the pulling agent as a function of the constant speed v.
- A
- B
- C
- D
Q. A current carrying loop of radius R and current I is placed in uniform magnetic field B perpendicular to its plane. What is the tension developed in the wire?
Q. The coil of area 0.1 m2 has 500 turns. After placing the coil in a magnetic field of strength 4× 10−4Wb/m2, if rotated through 90∘ in 0.1 s, the average emf induced in the coil is
- 0.2 V
- 0.1 V
- 0.012 V
- 0.05 V
Q.
A coil of area 80cm2 and 50 turns is rotating with 2000 revolutions per minute about an axis perpendicular to a magnetic field of 0.05 Tesla. The maximum value of the e.m.f. induced in it is