1
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The electric field of an electromagnetic wave in free space is given by $$\overrightarrow E = 10\cos ({10^7}t + kx)\widehat j\,\,V/m,$$ where t and x are in seconds and metres respectively. It can be inferred that
(1)  the wavelength $$\lambda $$ is 188.4 m.
(2)  the wave number k is 0.33 rad/m.
(3)  the wave amplitude is 10 V/m.
(4)  the wave is propagating along +x direction.

Which one of the following pairs of statements is correct ?
A
(3)  and  (4)
B
(1)  and  (2)
C
(2)  and  (3)
D
(1)  and  (3)
2
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The speed of light in media M1 and M2 are 1.5 $$ \times $$ 108 m/s and 2.0 $$ \times $$ 108 m/s respectively. A ray of light enters from medium M1 to M2 at an incidence angle i. If the rays suffers total internal reflection, the value of i is
A
Equal to sin$$-$$1 $$\left( {{2 \over 3}} \right)$$
B
Equal to or less than sin$$-$$1$$\left( {{3 \over 5}} \right)$$
C
Equal to or greater than sin$$-$$1 $$\left( {{3 \over 4}} \right)$$
D
Less than sin$$-$$1$$\left( {{2 \over 3}} \right)$$
3
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
A rays of light is incident on a 60o prism at the minimum deviation position. The angle of refraction at the first face (i.e., incident face) of the prism is
A
zero
B
30o
C
45o
D
60o
4
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
When monochromatic radiation of intensity $$I$$ falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2$$I$$, the number of emitted electrons and their maximum kinetic energy are respectively
A
N and 2T
B
2N and T
C
2N and 2T
D
N and T
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