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WorksheetsPHY150 (EXERCISE: CHAPTER 1-4)
Total questions: 25
Worksheet time: 28mins
Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
-1.5E-11 N
2.5E11 N
-2.5E11 N
-7.5E-10 N
Recap:
Coulomb’s law states that the force between two charged objects will __________ when the magnitude of the object’s charge increases.
Coulomb’s law also states that the force between two charged objects will __________ when the distance between objects increases.
increase; increase
increase; decrease
decrease; increase
decrease; decrease
FE= (k*q1*q2) / r2
Which statement best describes the electric fields in the image?
The charges are neutral.
Both charges are negative, so the field lines are alike.
The field lines move toward a positive charge and away from a negative charge.
The field lines move away from a positive charge and toward a negative charge.
A
B
C
D
Which of the following is true about the conservation of charges?
total charge in an isolated system is constant
charge in quantised
Q=ne
charge is not conserved
Based on the arrangement of the electric field lines in the diagram, what are the charges?
both charges are the same
the charges are opposite
they are neutral; no charge
Find the total resistance of the circuit
25Ω
75Ω
100Ω
18.75Ω
What is the total resistance of this circuit
.18Ω
5.45Ω
60Ω
6000Ω
What is the total resistance in this circuit?
21.5 ohms
13.2 ohms
9.8 ohms
2.7 ohms
Which diagram correctly shows the electric field around a negative charge?
A
B
they are both positive
Which statement best describes the electric fields in the image?
The charges are neutral.
Both charges are negative, so the field lines are alike.
The field lines move toward a positive charge and away from a negative charge.
The field lines move away from a positive charge and toward a negative charge.
A capacitor of two parallel conducting plates which are separated by a piece of dielectric, is fully charged by a battery as shown in the diagram above. The capacitance of the capacitor will change if
different dielectric is used
the capacitor is not fully charged
the battery of different voltage is used
the conducting plates of different metals are used
An empty parallel plate capacitor is connected to a battery that maintains a constant potential difference between the plates. A dielectric is inserted between the plates, what will happen to the capacitance of the system?
Increase, a dielectric material is used to higher the capacitance of the system.
Decrease, a dielectric material is used to lower the capacitance of the system
Remains the same with the value of potential difference because they are directly proportional with one another.
Remains the same with the value of potential difference because capacitance is not affected by the dielectric
What type of combination of capacitor is shown in the picture?
series
parallel
combination of series and paralell
none of the option
What does the Q represent?
Capacitance
Quality
Charge
Potential difference
Which is the value of the constant in Coulomb's equation?
k = 9·10-9
k = 9.8
k = 6.67·10-11
k = 9 ·109
Insulators are different than conductors in that insulators ____.
do not contain electrons or protons
do not contain any charge
have a weaker affinity for electrons
do not allow charge to freely move
What is the current in the 1kΩ resistor?
12 mA
6 mA
1.2 mA
0.6 mA
What is the voltage across the 2 kΩ resistor?
12 V
8 V
4 V
6 V
What is the equivalent capacitance between points a and b? All capacitors are 1.0 µF.
4.0 µF
17 µF
0.6 µF
0.25 µF
Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m2 using paper (k = 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate voltage of 5 000 V?
0.41 J
90 J
9 000 J
45 000 J
