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AIPMT 2010 Physics
Q. 14. An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the engine?
- 400 W
- 200 W
- 100 W
- 800 W
Sol: Amount of water flowing per second.
Answer : (1)
Q.15. Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?
- metallic bonding
- van der Waal’s bonding
- ionic bonding
- covalent bonding
Sol:
Metal − conductivity decreases with increase in temperature.
Answer : (1)
Q. 16. A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s−1. The induced e.m.f. when the radius is 2 cm, is:
Sol:
Answer : (2)