1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
An electron is accelerated from rest through a potential difference of V volt. If the de-Broglie wavelength of the electron is 1.227 $$ \times $$ 10-2 nm, the potential difference is :
A
102 V
B
103 V
C
104 V
D
10 V
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire systems is thermally insulated. The stop cock is suddenly opened. The Process is :
A
adiabatic
B
isochoric
C
isobaric
D
isothermal
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
For the logic circuit shown, the truth table is :
NEET 2020 Phase 1 Physics - Semiconductor Electronics Question 19 English
A
A B Y
0 0 0
0 1 1
1 0 1
1 1 1
B
A B Y
0 0 1
0 1 1
1 0 1
1 1 0
C
A B Y
0 0 1
0 1 0
1 0 0
1 1 0
D
A B Y
0 0 0
0 1 0
1 0 0
1 1 1
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The solids which have the negative temperature coefficient of resistance are :
A
insulators only
B
semiconductors only
C
insulators and semiconductors
D
metals
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