1
AIPMT 2012 Prelims
+4
-1
A ring is made of a wire having a resistance R0 = 12 $$\Omega$$. Find the points A and B, as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub circuit between these point is equal to $${8 \over 3}\Omega$$.
A
$${{{l_1}} \over {{l_2}}} = {5 \over 8}$$
B
$${{{l_1}} \over {{l_2}}} = {1 \over 3}$$
C
$${{{l_1}} \over {{l_2}}} = {3 \over 8}$$
D
$${{{l_1}} \over {{l_2}}} = {1 \over 2}$$
2
AIPMT 2012 Prelims
+4
-1
If voltage across a bulb rated 220 volt-100 watt drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is
A
20%
B
2.5%
C
5%
D
10%
3
AIPMT 2011 Mains
+4
-1
In the circuit shown in the figure, if the potential at point A is taken to be zero, the potential at point B is

A
+1 V
B
$$-$$1 V
C
+2 V
D
$$-$$2 V
4
AIPMT 2011 Mains
+4
-1
A thermocouple of negligible resistance produces an e.m.f. of 40 µV/ºC in the linear range of temperature. A galvanometer of resistance 10 ohm whose sensitivity is 1 µA/division, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be
A
1ºC
B
0.5 ºC
C
0.1ºC
D
0.25ºC
EXAM MAP
Medical
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