Electricity
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Semiconductor Electronics
MCQ (Single Correct Answer)
1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The mean free path for a gas, with molecular diameter d and number density n can be expressed as :
A
$${1 \over {\sqrt 2 n\pi {d^2}}}$$
B
$${1 \over {\sqrt 2 {n^2}\pi {d^2}}}$$
C
$${1 \over {\sqrt 2 {n^2}{\pi ^2}{d^2}}}$$
D
$${1 \over {\sqrt 2 n\pi d}}$$
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A cylinder contains hydrogen gas at pressure 249 kPa and temperature 27$$^\circ $$C
Its density is : (R = 8.3 J mol-1 K-1)
A
0.2 kg/m3
B
0.1 kg/m3
C
0.02 kg/m3
D
0.5 kg/m3
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The quantities of heat required to raise the temperature of two solid copper spheres of radii r1 and r2 (r1 = 1.5r2) through 1 K are in the ratio :
A
$${9 \over 4}$$
B
$${3 \over 2}$$
C
$${5 \over 3}$$
D
$${27 \over 8}$$
4
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
NEET Subjects