1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are F1, F2 and F3 respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is
AIPMT 2008 Physics - Moving Charges and Magnetism Question 37 English
A
$$\sqrt {{{\left( {{F_3} - {F_1}} \right)}^2} - F_2^2} $$
B
$${F_3} - {F_1} + {F_2}$$
C
$${F_3} - {F_1} - {F_2}$$
D
$$\sqrt {{{\left( {{F_3} - {F_1}} \right)}^2} + F_2^2} $$
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction $$\overrightarrow B $$. After 3 seconds the kinetic energy of the particle will be
A
T
B
4 T
C
3 T
D
2 T
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The resistance of an ammeter is 13 $$\Omega $$ and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The value of shunt-resistance is
A
2 $$\Omega $$
B
0.2 $$\Omega $$
C
2 k$$\Omega $$
D
20 $$\Omega $$
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R. The time period of rotation of the particle
A
depends on R and not on v
B
is independent of both v and R
C
depends on both v and R
D
depends on v and not on R
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