1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
In an electrical circuit R, L, C and a.c. voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is If instead, C is removed from the circuit, the phase difference is again. The power factor of the circuit is
A
$${1 \over 2}$$
B
$${1 \over {\sqrt 2 }}$$
C
1
D
$${{\sqrt 3 } \over 2}$$
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
The electric field associated with an em wave in vacuum is given by
E = $$\widehat i$$ 40 cos (kz $$-$$ 6 $$ \times $$ 108 t) where E, z and t are in volt/m, meter and seconds respectively. The value of wave vector k is
A
2 m$$-$$1
B
0.5 m$$-$$1
C
6 m$$-$$1
D
3 m$$-$$1
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
An $$\alpha $$-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m2. The de Broglie wavelength associated with the particle will be
A
1 $$\mathop A\limits^ \circ $$
B
0.1 $$\mathop A\limits^ \circ $$
C
10 $$\mathop A\limits^ \circ $$
D
0.01 $$\mathop A\limits^ \circ $$
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emerges normally from the opposite face. If the refractive index of the prism is $$\mu $$. the angle of incidence i, is nearly equal to
A
$$\mu $$A
B
$${{\mu A} \over 2}$$
C
$${A \over \mu }$$
D
$${A \over {2\mu }}$$