1
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Which of the following is not the property of cathode rays ?
A
In produces heating effect
B
It does not deflect in electric field
C
It casts shadow
D
It produces fluorscence.
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
When ultraviolet rays incident on metal plate then photoelectric effect does not occur, it occurs by incidence of
A
infrared rays
B
X-rays
C
radio wave
D
micro wave
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
If particles are moving with same velocity, then which has maximum de Broglie wavelength?
A
proton
B
$$\alpha $$-particle
C
neutron
D
$$\beta $$-particle
4
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
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