6. A positively charged electroscope has a) fewer electrons than protons. b) more electrons than protons. c) no electrons. d) the same number of protons and electrons. e) no protons 7. Two equally charged balls repel each other. Which change will increase the force between them the most? a) Decrease the distance between the balls by a factor of 2 b) Increase the distance between the balls by a factor of 5 c) Increase the charge on each ball by factor of 2 d) Increase the charge on one of the balls by factor of 5 e) Decrease the charge on one of the balls by a factor of 5 8. An oil drop has a charge of -1.12x10-18 Coulomb. How many excess electrons does the oil drop have? c) 5 a) 1 b) 3 d) 7 e) 2 9. The diagram shows an electric field around three charged spheres. Which statement describes the charges on the spheres?
Simple harmonic motion
Simple harmonic motion is a type of periodic motion in which an object undergoes oscillatory motion. The restoring force exerted by the object exhibiting SHM is proportional to the displacement from the equilibrium position. The force is directed towards the mean position. We see many examples of SHM around us, common ones are the motion of a pendulum, spring and vibration of strings in musical instruments, and so on.
Simple Pendulum
A simple pendulum comprises a heavy mass (called bob) attached to one end of the weightless and flexible string.
Oscillation
In Physics, oscillation means a repetitive motion that happens in a variation with respect to time. There is usually a central value, where the object would be at rest. Additionally, there are two or more positions between which the repetitive motion takes place. In mathematics, oscillations can also be described as vibrations. The most common examples of oscillation that is seen in daily lives include the alternating current (AC) or the motion of a moving pendulum.
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