1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A round disc of moment of inertia $$I$$2 about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia $$I$$1 rotating with an angular velocity $$\omega $$ about the same axis. The final angular velocity of the combination of discs is
A
$${{{I_2}\omega } \over {{I_1} + {I_2}}}$$
B
$$\omega $$
C
$${{{I_1}\omega } \over {{I_1} + I{}_2}}$$
D
$${{\left( {{I_1} + {I_2}} \right)\omega } \over {{I_1}}}$$
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The unit of permittyvity of free space, $${\varepsilon _0}$$, is
A
coulomb/newton-metre
B
newton-metre2/coulomb2
C
coulomb2/newton-metre2
D
coulomb2/(newton-metre)2
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
If $$\left| {\overrightarrow A \times \overrightarrow B } \right| = \sqrt 3 \overrightarrow A .\overrightarrow B $$ then the value of $$\left| {\overrightarrow A + \overrightarrow B } \right|$$ is
A
(A2 + b2 + AB)1/2
B
$${\left( {{A^2} + {B^2} + {{AB} \over {\sqrt 3 }}} \right)^{1/2}}$$
C
A + B
D
(A2 + B2 + $${\sqrt 3 }$$AB)1/2.
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A block of mass m is placed on a smooth wedge of inclination $$\theta $$. The whole system is accelerated horizontally so that the block does not slip on the wedge. The force exerted by the wedge on the block will be (g is acceleration due to gravity)
A
mg cos$$\theta $$
B
mg sin$$\theta $$
C
mg
D
mg/cos $$\theta $$
EXAM MAP