1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is
A
5 seconds
B
1/5 seconds
C
40 seconds
D
20 seconds
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The magnetic flux through a circuit of resistance R changes by an amount $$\Delta $$$$\phi $$ in a time $$\Delta $$t. Then the total quantity of electric charge Q that passes any point in the circuit during the time $$\Delta $$t is represented by
A
$$Q = {1 \over R}.{{\Delta \phi } \over {\Delta t}}$$
B
$$Q = {{\Delta \phi } \over R}$$
C
$$Q = {{\Delta \phi } \over {\Delta t}}$$
D
$$Q = R.{{\Delta \phi } \over {\Delta t}}$$
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000 $$\mathop A\limits^ \circ $$, is of the order of
A
0.5 m
B
5 m
C
5 mm
D
5 cm
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively
A
2q.E and minimum
B
q.E and p.E
C
zero and minimum
D
q.E and maximum
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