1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
J.J. Thomson's cathode-ray tube experiment demonstrated that
A
cathode rays are streams of negatively charged ions
B
all the maas of an atom is essentially in the nucleus
C
the e/m of electrons is much greater than the e/m of protons
D
the e/m ratio of the cathode-ray particles changes when a different gas is placed in the discharge tube
2
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.
3
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
4
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
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