The current $$i$$ in a coil varies with time as shown in the figure. The variation of induced emf with time would be
A
B
C
D
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s$$-$$1. The induced emf when the radius is 2 cm, is
A
$$2\pi \mu V$$
B
$$\pi \mu V$$
C
$${\pi \over 2}\mu V$$
D
2$$\mu $$$$V$$
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity. $$\overrightarrow V = v\widehat i$$. The magnetic field is directed along the negative z axis direction. The induced emf, during the passes of these loops, out of the field region, will not remain constant for
A
The circular and the elliptical loops
B
only the ellliptical loop
C
any of the four loops
D
the rectangular, circular and elliptical loops
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mm/s. The induced emf in the loop when the radius is 2 cm is
