Q. a) What is the net charge of a chargedcapacitor? (b) If a drop of liquid has
ID: 1751798 • Letter: Q
Question
Q.
a)
What is the net charge of a chargedcapacitor?
(b)
If a drop of liquid has capacitance 1.00 pF, what is itsradius? (b) If another drop has radius 2.00 mm, what is itscapacitance? (c) What is the charge on the smaller drop if itspotential is 100 V?
(c)
A satellite in orbit is not truly traveling through a vacuum. Itis moving through very, very thin air. Does the resulting airfriction cause the satellite to slow down?
d) Explain the similarities anddifferences between Newton’s law of universal gravitation andCoulomb’slaw.
Explanation / Answer
Given : a ) The net charge of acharged capacitor is zero ( 0 ) +q + (- q ) = 0 Charges are adde with their signs. However , we referto the charge of a capacitor as being q ( the charge of a capacitoris not the net charge ) b ) Capacitance ( C ) = 1.00 pF Area of the sphere ( A ) = 4r2 C = o A/d Where o =8.85*10-12 farad/meter d = 2 r C = o 4r2 /2r =o4r / 2 r = C / o2 = ----- m d ) Similarity: 1) Both apply the inverse-squarelaw; intenity inversely proportional to square of the distance. 2)Talking about spherical objects i.e. point charge, point mass.Differences: 1) one is about large mass; one isabout small size huge charges. 2) Gravitation is ONLY ABOUTattraction and NO repulsion. Coulomb's force has both attractionand repulsionI hope it helps you The net charge of acharged capacitor is zero ( 0 ) +q + (- q ) = 0 Charges are adde with their signs. However , we referto the charge of a capacitor as being q ( the charge of a capacitoris not the net charge ) b ) Capacitance ( C ) = 1.00 pF Area of the sphere ( A ) = 4r2 C = o A/d Where o =8.85*10-12 farad/meter d = 2 r C = o 4r2 /2r =o4r / 2 r = C / o2 = ----- m d ) Similarity: 1) Both apply the inverse-squarelaw; intenity inversely proportional to square of the distance. 2)Talking about spherical objects i.e. point charge, point mass.Differences: 1) one is about large mass; one isabout small size huge charges. 2) Gravitation is ONLY ABOUTattraction and NO repulsion. Coulomb's force has both attractionand repulsion
I hope it helps you C = o A/d Where o =8.85*10-12 farad/meter d = 2 r C = o 4r2 /2r =o4r / 2 r = C / o2 = ----- m d ) Similarity: 1) Both apply the inverse-squarelaw; intenity inversely proportional to square of the distance. 2)Talking about spherical objects i.e. point charge, point mass.Differences: 1) one is about large mass; one isabout small size huge charges. 2) Gravitation is ONLY ABOUTattraction and NO repulsion. Coulomb's force has both attractionand repulsion
I hope it helps you
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