1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. Assuming the gases to be ideal and the oxygen bond to be rigid, the total internal energy (in units of RT) of the mixture is :
A
11
B
20
C
15
D
13
2
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A particle of mass m with an initial velocity $$u\widehat i$$ collides perfectly elastically with a mass 3 m at rest. It moves with a velocity $$v\widehat j$$ after collision, then, v is given by :
A
$$v = \sqrt {{2 \over 3}} u$$
B
$$v = {u \over {\sqrt 3 }}$$
C
$$v = {u \over {\sqrt 2 }}$$
D
$$v = {1 \over {\sqrt 6 }}u$$
3
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity $$\rho $$C, $$\rho $$T, $$\rho $$M and $$\rho $$A respectively. Then :
A
$$\rho $$C > $$\rho $$A > $$\rho $$T
B
$$\rho $$M > $$\rho $$A > $$\rho $$C
C
$$\rho $$A > $$\rho $$T > $$\rho $$C
D
$$\rho $$A > $$\rho $$M > $$\rho $$C
4
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
JEE Main 2020 (Online) 2nd September Morning Slot Physics - Geometrical Optics Question 117 English A spherical mirror is obtained as shown in the figure from a hollow glass sphere. If an object is positioned in front of the mirror, what will be the nature and magnification of the image of the object?
(Figure drawn as schematic and not to scale)
A
Inverted, real and unmagnified
B
Inverted, real and magnified
C
Erect, virtual and magnified
D
Erect, virtual and unmagnified
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