1
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Identical charges ($$-$$q) are placed at each corners of cube of side b then electrostatic potential energy of charge (+q) which is placed at centre of cube will be
A
$${{ - 4\sqrt 2 {q^2}} \over {\pi {\varepsilon _0}b}}$$
B
$${{ - 8\sqrt 2 {q^2}} \over {\pi {\varepsilon _0}b}}$$
C
$${{ - 4\,{q^2}} \over {\sqrt 3 \,\pi {\varepsilon _0}b}}$$
D
$${{8\sqrt 2 \,{q^2}} \over {4\,\pi {\varepsilon _0}b}}$$
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Some charge is being given to a conductor. Then its potential is
A
maximum at surface
B
maximum at centre
C
remain same throughout the conductor
D
maximum somewhere between surface and centre.
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
For a cell terminal potential difference is 2.2V when circuit is open and reduce to 1.8 V when cell is connected to a resistance of R = 5 $$\Omega $$. Determine internal resistance of cell (r)
A
$${{10} \over 9}\Omega $$
B
$${{9} \over 10}\Omega $$
C
$${{11} \over 9}\Omega $$
D
$${{5} \over 9}\Omega $$
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Specific resistance of a conductor increases with
A
increase in temperature
B
increase in cross-section area
C
increase in cross-section and decrease in length
D
decrease in cross secton area.
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