1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Copper and silicon is cooled from 300 K to 60 K , the specific resistance
A
decrease in copper but increase in silicon
B
increase in copper but decrease in silicon
C
increase in both
D
decrease in both
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
The resistance of each arm of the Wheatstone's bridge is 10 ohm. A resistance of 10 ohm is connected in series with a galvanometer then the equivalent resistance across the battery will be
A
10 ohm
B
15 ohm
C
20 ohm
D
40 ohm
3
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
The potentiometer is best for measuring voltage, as
A
it has a sensitive galvanometer and gives null deflection
B
it has wire of high resistance
C
it measures p.d. in closed circuit
D
it measures p.d in open circuit.
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Two bulbs of (40 W, 200 V), and (100 W, 200 V). Then correct relation for their resistances
A
R40 < R100
B
R40 > R100
C
R40 = R100
D
no relation can be predicted.
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