1
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
A closely wound solenoid of 2000 turns and area of cross-section 1.5 $$ \times $$ 10$$-$$4 m2 carries a current of 2.0 A. It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field 5 $$ \times $$ 10$$-$$2 tesla making an angle of 30o with the axis of the solenoid. The torque on the solenoid will be
A
3 $$ \times $$ 10$$-$$3 N m
B
1.5 $$ \times $$ 10$$-$$3 N m
C
1.5 $$ \times $$ 10$$-$$2 N m
D
3 $$ \times $$ 10$$-$$2 N m
2
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Two identical bar magnets are fixed with their centers at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure

AIPMT 2010 Mains Physics - Magnetism and Matter Question 22 English
The force on the charge Q is
A
zero
B
directed along OP
C
directed along PO
D
directed perpendicular to the plane of paper
3
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The magnetic moment of a diamagnetic action is
A
much greater than one
B
1
C
between zero and one
D
equal to zero
4
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
A condenser of capacity C is charged to a potential difference of V1. The plates of th condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the potential difference across the condenser reduces to V2 is
A
$${\left( {{{C{{\left( {{V_1} - {V_2}} \right)}^2}} \over L}} \right)^{{1 \over 2}}}$$
B
$${{C\left( {V_1^2 - V_2^2} \right)} \over L}$$
C
$${{C\left( {V_1^2 + V_2^2} \right)} \over L}$$
D
$${\left( {{{C\left( {V_1^2 - V_2^2} \right)} \over L}} \right)^{{1 \over 2}}}$$
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