AIPMT 2011 Solved Papers
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Physics 2011
Q. 16. Four electric charges +q, +q, –q and –qare placed at the corners of a square of side 2L(see figure). The electric potential at point A, midway between the two charges +q and +q, is:
Sol.
Answer : (4)
Q. 17. A parallel plate condenser has a uniform electric field E (V/m) in the space between the plates. If the distance between the plates is d (m) and area of each plate is A(m)2 the energy (joules) stored in the condenser is
Sol.
Answer : (1)
Q. 18. If power dissipated in the 9 W resistor in the circuit shown is 36 Watt, the potential difference across the 2 Ω resistor is
(1) 2 Volt (2) 4 Volt
(3) 8 Volt (4) 10 Volt
Sol :
Current in 9 Ω is 2A, so that in 6Ω is 3A. Total current is 2 + 3 = 5A. Potential drop = 5 × 2 = 10V
Answer: (4)
Q. 19. A current of 2 A flows through a 2 Ω resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 Ω resistor. The internal resistance of the battery is
(1) 1 Ω (2) 0.5 Ω
(3) 1/3 Ω (4) 1/4 Ω
Sol :
Answer: (3)
Q. 20. The rate of increase of thermo e.m.f. with temperature at the neutral temperature of a thermocouple
(1) Is negative (2) Is positive
(3) Is zero (4) Depends upon the choice of the two materials of the thermocouple
Sol :
Slope is zero at neutral temperature.
Answer: (3)