1.How many electrons make up 1.75 coulomb of charge? ( Hint: q = ne .) 2.An obje
ID: 1465408 • Letter: 1
Question
1.How many electrons make up 1.75 coulomb of charge? (Hint: q = ne.)
2.An object has four million more electrons than protons. What is the net charge of the object?
3.What are the forces on two charges of +0.50 C and +5.0 C, respectively, if they are separated by a distance of 5.0 m?
b. Compare this to the gravitational force between these particles.
5,To separate a 0.26 C charge from another charge, 38 J of work is done. What is the electric potential energy of the charge?
6.To separate a 0.28 C charge from another charge, 38 J of work is done. What is the voltage of the 0.28 C charge?
7.If an electrical component with a resistance of 65 is connected to a 117-V source, how much current flows through the component?
8.What battery voltage is necessary to supply 0.46 A of current to a circuit with a resistance of 24 ?
9.A flashlight uses batteries that add up to 1.5 V and has a power output of 0.38 W.
(a) How much current is drawn from the batteries?
A
(b) What is the effective resistance of the flashlight?
Explanation / Answer
1) Apply, Q = N*e
==> N Q/e
= 1.75/(1.6*10^-19)
= 1.09375*10^19
2) Q = 4*10^6*e
= 4*10^6*(-1.6*10^-19)
= -6.4*10^-13 C
3)
F = k*q^2/d^2
= 9*10^9*0.5^2/5^2
= 9*10^7 N
4) F = k*q^2/d^2
= 9*10^9*(1.6*10^-19)^2/(5.9*10^-11)^2
= 6.62*10^-8 N
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