1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A bar magnet having a magnetic moment of 2 $$ \times $$ 104 J T$$-$$1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 $$ \times $$ 10$$-$$4 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60o from the field is
A
12 J
B
6 J
C
2 J
D
0.6 J
2
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
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Power dissipated in an LCR series circuit connected to an A.C. source of emf $$\varepsilon $$ is
A
$${{{\varepsilon ^2}\sqrt {{R^2} + {{\left( {L\omega - {1 \over {\omega }}} \right)}^2}} } \over R}$$
B
$${{{\varepsilon ^2}\sqrt {{R^2} + {{\left( {L\omega - {1 \over {C\omega }}} \right)}^2}} } \over R}$$
C
$${{{\varepsilon ^2}R} \over {\sqrt {{R^2} + {{\left( {L - {1 \over {C\omega }}} \right)}^2}} }}$$
D
$${{{\varepsilon ^2}R} \over {\left[ {{R^2} + {{\left( {L\omega - {1 \over {C\omega }}} \right)}^2}} \right]}}$$
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
A
4.8$$\pi $$$$\mu $$V
B
0.8$$\pi $$$$\mu $$V
C
1.6$$\pi $$$$\mu $$V
D
3.2$$\pi $$$$\mu $$V
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12