1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Four electric charges +q, +q, $$-$$ q and $$-$$ q are placed at the corners of a square of side 2L (see figure). The electric potential at point A, midway between the two charges + q and +q, is

AIPMT 2011 Prelims Physics - Electrostatics Question 55 English
A
$${1 \over {4\pi {\varepsilon _0}}}{{2q} \over L}\left( {1 + \sqrt 5 } \right)$$
B
$${1 \over {4\pi {\varepsilon _0}}}{{2q} \over L}\left( {1 + {1 \over {\sqrt 5 }}} \right)$$
C
$${1 \over {4\pi {\varepsilon _0}}}{{2q} \over L}\left( {1 - {1 \over {\sqrt 5 }}} \right)$$
D
zero
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will
A
increase four times
B
be reduced to half
C
remain the same
D
be doubled
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
If power dissipated in the 9 $$\Omega $$ resistor in the circuit shown is 36 watt, the potential difference across the 2 $$\Omega $$ resistor is

AIPMT 2011 Prelims Physics - Current Electricity Question 88 English
A
4 volt
B
8 volt
C
10 volt
D
2 volt
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A current carrying closed loop in the form of a right angle isosceles triangle ABC is placed in uniform magnetic field acting along AB. If the magnetic force on the arm BC is $$\overrightarrow {F,} $$ the force on the arm AC is

AIPMT 2011 Prelims Physics - Moving Charges and Magnetism Question 60 English
A
$$ - \sqrt 2 \,\overrightarrow F $$
B
$$-$$ $$\,\overrightarrow F $$
C
$$\,\overrightarrow F $$
D
$$\sqrt 2 \,\overrightarrow F $$