1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
An electron of mass m with an initial velocity
$$\overrightarrow v = {v_0}\widehat i$$ (v0 > 0)
enters an electric field
$$\overrightarrow E = - {\overrightarrow E _0}\widehat i$$
(E0
= constant > 0) at t = 0. If $$\lambda $$0
is its de-Broglie wavelength initially, then its
de- Broglie wavelength at time t is
2
NEET 2018
MCQ (Single Correct Answer)
+4
-1
When the light of frequency 2$${\upsilon _0}$$
(where $${\upsilon _0}$$
is
threshold frequency), is incident on a metal
plate, the maximum velocity of electrons
emitted is v1
. When the frequency of the
incident radiation is increased to 5$${\upsilon _0}$$
, the
maximum velocity of electrons emitted from
the same plate is v2
. The ratio of v1
to v2
is
3
NEET 2018
MCQ (Single Correct Answer)
+4
-1
In the combination of the following gates
the output Y can be written in terms of inputs
A and B as
![NEET 2018 Physics - Semiconductor Electronics Question 29 English](https://neetcare-image.cdn.examgoal.net/1qpqahkka88fkk5/7678a90e-43c6-418d-8b19-d6c21f9b177c/3d5a9050-96af-11ea-aedc-f1c8d8e0194b/file-1qpqahkka88fkk6-473w.jpg)
![NEET 2018 Physics - Semiconductor Electronics Question 29 English](https://neetcare-image.cdn.examgoal.net/1qpqahkka88fkk5/7678a90e-43c6-418d-8b19-d6c21f9b177c/3d5a9050-96af-11ea-aedc-f1c8d8e0194b/file-1qpqahkka88fkk6-473w.jpg)
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
The ratio of kinetic energy to the total energy
of an electron in a Bohr orbit of the hydrogen
atom, is
Paper analysis
Total Questions
Biology
79
Chemistry
36
Physics
43
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