1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The electric and magnetic field of an electromagnetic wave are
A
in opposite phase and perpendicular to each other
B
in opposite phase and parallel to each other
C
in phase and perpendicular to each other
D
in phase and parallel to each other.
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Two condensers, one of capacity C and other of capacity C/2 are connected to a V-volt battery, as shown in the figure. The work done in charging fully both the condensers is

AIPMT 2007 Physics - Capacitor Question 23 English
A
$${1 \over 4}C{V^2}$$
B
$${3 \over 4}C{V^2}$$
C
$${1 \over 2}C{V^2}$$
D
2CV2
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The frequency of a light wave in a material is 2 $$ \times $$ 1014 Hz and wavelength is 5000 $$\mathop A\limits^ \circ $$. The refractive index of material will be
A
1.50
B
3.00
C
1.33
D
1.40
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Monochromatic light of frequency 6.0 $$ \times $$ 1014 Hz is produced by a laser. The power emitted is 2 $$ \times $$ 10$$-$$3 W. The number of photons emitted, on the average, by the source per second is
A
5 $$ \times {10^{16}}$$
B
5 $$ \times {10^{17}}$$
C
5 $$ \times {10^{14}}$$
D
5 $$ \times {10^{15}}$$
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