1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+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%
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+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
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+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
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A current of 2 A flows through a 2 $$\Omega$$ resistor when connected across a battery a 2 $$\Omega$$ resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 $$\Omega$$ resistor. The internal resistance of the battery is
A
0.5 $$\Omega$$
B
1/3 $$\Omega$$
C
1/4 $$\Omega$$
D
1 $$\Omega$$
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