1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A ray of light travelling in air have wavelength $$\lambda $$, frequency n, velocity v and intensity $$I$$. If this ray enters into water then these parameters are $$\lambda $$', n', v' and $$I$$' respectively. Which relation is correct from following ?
A
$$\lambda $$ = $$\lambda $$'
B
n = n'
C
v = v'
D
$$I$$ = $$I$$'.
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
In Thomson mass spectrograph $$\overrightarrow E \bot \overrightarrow B $$ then the velocity of electron beam will be
A
$${{\left| {\overrightarrow E } \right|} \over {\left| {\overrightarrow B } \right|}}$$
B
$$\overrightarrow E \times \overrightarrow B $$
C
$${{\left| {\overrightarrow B } \right|} \over {\left| {\overrightarrow E } \right|}}$$
D
$${{{{\overrightarrow E }^2}} \over {{{\overrightarrow B }^2}}}$$
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance become d/2, then number of electrons emitted per second, will be
A
remain same
B
four times
C
two times
D
one-fourth
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Among which the magnetic susceptibility does not depened on the temperature ?
A
diamagnetism
B
paramagnetism
C
ferromagnetism
D
ferrite.