1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1

In the circuit shown, the current through the 4 $$\Omega$$ resistor is 1 amp when the points P and M are connected to a d.c. voltage source. The potential difference betwen the points M and N is
A
0.5 volt
B
3.2 volt
C
1.5 volt
D
1.0 volt
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively
A
both remain the same
B
1.1 times, 1.1 times
C
1.2 times, 1.1 times
D
1.21 times, same
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20oC ? The temperature of boiling water is 100oC
A
12.6 min
B
4.2 min
C
6.3 min
D
8.4 min
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A current of 3 amp. flows through the 2 $$\Omega$$ resistor shown in the circuit. The power dissipated in the 5 $$\Omega$$ resistor is

A
1 watt
B
5 watt
C
4 watt
D
2 watt
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