A transformer consists of a 500-turn primary coil and a 2000-turn secondary coil. If the current in the secondary is 3.0 A, what is the current in the primary?
A) 0.75 A
B) 1.3 A
C) 12 A
D) 24 A
E) 48 A
C
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Ideal Gas Law: A gas-filled vertical cylinder, closed at the bottom end, is fitted at the top with a piston that can move freely. The mass of the piston is 10.0 kg, and the initial height of the piston above the bottom of the cylinder is 25 cm. A mass of 8.0 kg is placed on the piston. What is the resulting height of the piston, assuming that the temperature of the ideal gas is kept constant?
A. 12 cm B. 13 cm C. 14 cm D. 15 cm E. 16 cm
1.0 kg of steam at 100°C condenses to water at 100°C. What is the change in entropy in the process?
A) zero B) 6.1 × 103 J/K C) 3.0 × 103 J/K D) -6.1 × 103 J/K E) none of the above
Why is gasification being pursued as an option for coal use?
What will be an ideal response?
A solenoid carrying an electric current, if free to rotate when placed in a magnetic field, will tend to orient its axis ________ (parallel, perpendicular, anti-parallel) to the magnetic field.
Fill in the blank(s) with the appropriate word(s).