1
IIT-JEE 2012 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
A mixture of 2 moles of helium gas (atomic mass = 4 amu) and 1 mole of argon gas (atomic mass = 40 amu) is kept at 300 K in a container. The ratio of the rms speeds $$\left( {{{{v_{rms}}\left( {helium} \right)} \over {{v_{rms}}\left( {\arg on} \right)}}} \right)$$ is
A
0.32
B
0.45
C
2.24
D
3.16
2
IIT-JEE 2012 Paper 1 Offline
MCQ (Single Correct Answer)
+4
-1
Two large vertical and parallel metal plates having a separation of $$1$$ $$cm$$ are connected to a $$DC$$ voltage source of potential difference $$X$$. A proton is released at rest midway between the two plates. It is found to move at $${45^ \circ }$$ to the vertical JUST after release. Then $$X$$ is nearly
A
$$1 \times {10^{ - 5}}\,\,V$$
B
$$1 \times {10^{ - 7}}\,\,V$$
C
$$1 \times {10^{ - 9}}\,\,V$$
D
$$1 \times {10^{ - 10}}\,\,V$$
3
IIT-JEE 2012 Paper 1 Offline
MCQ (Single Correct Answer)
+4
-1
Consider a thin spherical shell of radius $$R$$ with center at the origin, carrying uniform positive surface charge density. The variation of the magnitude of the electric field $$\left| {\overrightarrow E \left( r \right)} \right|$$ and the electric potential $$V(r)$$ with the distance $$r$$ from the center, best represented by which graph?
A
IIT-JEE 2012 Paper 1 Offline Physics - Electrostatics Question 49 English Option 1
B
IIT-JEE 2012 Paper 1 Offline Physics - Electrostatics Question 49 English Option 2
C
IIT-JEE 2012 Paper 1 Offline Physics - Electrostatics Question 49 English Option 3
D
IIT-JEE 2012 Paper 1 Offline Physics - Electrostatics Question 49 English Option 4
4
IIT-JEE 2012 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
A cubical region of side $$a$$ has its center at the origin. It encloses three fixed point charges, $$-q$$ at $$\left( {0, - a/4,0} \right), + 3q$$ at $$\left( {0,0,0} \right)$$ and $$-q$$ at $$\left( {0, + a/4,0} \right).$$ Choose the correct option(s)
IIT-JEE 2012 Paper 1 Offline Physics - Electrostatics Question 42 English
A
The net electric flux crossing the plane $$x=+a/2$$ is equal to the net electric flux crossing the plane $$x=-a/2$$
B
The net electric flux crossing the plane $$y=+a/2$$ is more than the net electric flux crossing the plane $$y=-a/2.$$
C
The net electric flux crossing the entire region is $${q \over {{\varepsilon _0}}}$$
D
The net electric flux crossing the plane $$z = + a/2$$ is equal to the net electric flux crossing the plane $$x=+a/2.$$
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