An ideal solenoid has a self-inductance L. If you now double its radius and its length, but do not change the number of coils, what will its self-inductance be?
A) L/4 B) L/2 C) 4L D) L E) 2L
B
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Sound waves in space
A) do not exist. B) travel so slowly that they are unnoticeable. C) travel much faster than sound on Earth but have such low density that they are inaudible. D) travel much faster than sound on Earth and are therefore very loud. E) can travel through the halo but not the disk of the galaxy.
The density of aluminum is 2700 kg/m3. An aluminum block has a mass of 2.5 kg. The buoyant force exerted on this block when it is completely submerged in water of density 1000 kg/m3 is approximately
A. 0.0091 N. B. 24.5 N. C. 2.5 N. D. 0.93 N. E. 9.1 N.
You are given two converging lenses to build a compound microscope. Lens A has focal length 0.50 cm and lens B has focal length of 3.0 cm. Which of the two lenses would you use for the objective?
A) Lens A, because it has the shorter focal length. B) Lens B, because it has the longer focal length. C) It makes no difference which lens I use for the objective. D) None, because the objective should be a diverging lens.
Discuss whether it is possible to have a displacement whose magnitude is greater than the distance traveled
What will be an ideal response?