1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampare range. The value (in ohm) of neccessary shunt will be
A
0.001
B
0.01
C
1
D
0.05
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
An alternating electric field, of frequency $$v$$, is applied across the does (radius = R) of a cyclotron that is being used to accelerate protons (mass = m). The operating magnetic field (B) used in the cyclotron and the kinetic energy (K) of the proton beam, produced by it, are given by
A
$$B = {{m\upsilon } \over e}$$  and  $$K = 2m{\pi ^2}{\upsilon ^2}{R^2}$$
B
$$B = {{2\pi m\upsilon } \over e}$$  $$K = {m^2}\pi \upsilon {R^2}$$
C
$$B = {{2\pi m\upsilon } \over e}$$  $$K = 2m{\pi ^2}{v^2}{R^2}$$
D
$$B = {{m\upsilon } \over e}$$  $$K = {m^2}\pi \upsilon {R^2}$$
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
What is the flux through a cube of side $$a$$ if a point charge of q is at one of its corner?
A
$${{2q} \over {{\varepsilon _0}}}$$
B
$${q \over {8{\varepsilon _0}}}$$
C
$${q \over {{\varepsilon _0}}}$$
D
$${q \over {2{\varepsilon _0}}}6{a^2}$$
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes an angle $$\theta $$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $$\theta $$ = 90o, the torque and the potential energy of the dipole will respectively be
A
pEsin$$\theta $$,  $$-$$pEcos$$\theta $$
B
pEsin$$\theta $$,  $$-$$2pEcos$$\theta $$
C
pEsin$$\theta $$, 2pEcos$$\theta $$
D
pEcos$$\theta $$,  $$-$$pEsin$$\theta $$