Which one of the following sets of characteristics describes the image formed by

Question

Which one of the following sets of characteristics describes the image formed by a concave mirror when an object is placed outside of the focal point? a. Real and Inverted b. Real and Upright c. Virtual and Inverted d. Virtual and Upright. Based on the figure below, what is the Coulomb force between one of the protons and the electron? a. 9.2 times 10^-10 N b. 2.6 times 10^-11 N c. 5.4 times 10^-11 N d. 2.3 times 10^-10 N Based on the circuit diagram above, what will be the maximum charge on the capacitor after the switch been closed for some time? a. 15 C b. 15 mu C c. 0.15 C d.) 6.7 mu C

Explanation / Answer

1) when object is outside focal point image will always be REAL AND INVERTED. option a

2) F = K Q1Q2/R^2

Q1 = Q2 = 1.6 X 10^-19 they vary only in sign not in magnitude

R= (0.50^2 + 2^2 )^1/2 nm

R^2 =  (0.50^2 + 2^2 ) nm =4.25 X 10^-18 m sq

putting all these in equation we get

F =5.42x 10^-11

option c

3) Q = CV = 10X10^-6 F X 1.5 V = 15uC OPTION b

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