1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A galvanometer of resistance 50 $$\Omega $$ is connected to a battery of 3 V along with a resistance of 2950 $$\Omega $$ in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be
A
$$6050$$ $$\Omega $$
B
$$4450\,\Omega $$
C
$$5050\,\Omega $$
D
$$5550\,\Omega $$
2
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
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 2006
MCQ (Single Correct Answer)
+4
-1
When a charged particle moving with velocity $$\overrightarrow v $$ is subjected to a magnetic field of induction $$\overrightarrow B $$, the force on it is non-zero. This implies that
A
angle between is either zero or 180o
B
angle between is necessarily 90o
C
angle between can have any value other than 90o
D
angle between can have any value other than zero and 180o.
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