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WorksheetsÔN THI HKII KHỐI 11
Total questions: 94
Worksheet time: 1hrs 15mins
The work done by the electric field on a charge
depends on the shape of the path of the area.
does not depend on the shape of the path of the charge.
depends only on the magnitude of the charge.
depends only on the intensity of the electric field.
The electric potential energy of a charge q placed at point M in any electric field does not depend on
the charge q.
the position of point M.
the electric field.
the mass of the charge q.
The work done by the electric field when a charge moves from point M to point N in a uniform electric field is A = qEd. Where d is
the length MN.
the length of the path of the charge.
the diameter of the charged sphere.
the projection of the path onto the direction of a field line.
A charge moves in the electric field along a closed curve. Let the work done by the electric force in that motion be A then
A > 0 if q > 0.
A > 0 if q < 0.
A < 0 if q < 0.
The work done by the electric force on a point charge when moving from point M to point N in the electric field
is directly proportional to the length of the path MN.
is directly proportional to the magnitude of the charge.
is directly proportional to the time of movement.
is directly proportional to the speed of displacement.
Choose the incorrect statement?
The work done by the electric force is an algebraic quantity.
The electric force is a conservative force.
At the reference point of potential energy, the electric field has no capacity.
The work done by the electric force always has a positive value.
The relationship between the electric potential UMN and the electric potential UNM is
UMN = UNM.
UMN = - UNM.
The relationship between the electric field intensity E and the electric potential U between two points where the projection of the line connecting those two points onto the field line is d is given by the expression
U = E.d.
U =
U = q.E.d.
The potential energy of a charge in the electric field
The electric field strength E and the potential difference U between two points, where the projection of the line connecting those two points onto the electric field line is d, is given by the expression.
U = E.d.
U =
U = q.E.d.
U =
The potential energy of a charge in an electric field is characterized by
the ability to exert force of the electric field.
the direction of the electric field intensity.
the magnitude of the space with an electric field.
the ability to do work of the electric field.
An electron is released to move in a uniform electric field from rest. After traveling a certain distance in the electric field, then
the electric potential energy of the electric field increases.
the electric potential energy of the electric field decreases.
the electric potential energy of the electric field remains unchanged.
the electric potential energy of the electron increases.
A positive point charge q moves along the edges of an equilateral triangle ABC. Triangle ABC is in a uniform electric field, the direction of the electric field lines is from C to B. Let AAB and AAC be the electric work done when the charge moves from A to B and from A to C respectively, then we have
AAB = - AAC
AAB = AAC
AAB = - 2AAC
AAB = 2AAC
The unit of electric potential is
Volt (V).
Joule (J).
Volt per meter (V/m).
Watt (W).
The electric potential at a point M in any electric field with electric field intensity does not depend on
the position of point M.
the electric field intensity.
the charge q placed at point M.
the reference point chosen for the electric potential.
Placing a test charge q in a uniform electric field with intensity E of two oppositely charged parallel plates with equal magnitude, the expression representing a quantity with the unit Volt is
qEd.
qE.
Ed.
qU.
Releasing an electron with no initial velocity in any electric field (neglecting the effect of gravity) will it
move from the point with high potential to the point with low potential.
move
Drop an electron with no initial velocity in any electric field (ignore the effect of the gravitational field), it will
move from the point with high potential to the point with low potential.
move from the point with low potential to the point with high potential.
move in the same direction as the electric field lines.
stay still.
The potential difference between two points M, N is UMN = 40V. Choose the definitely correct statement.
The potential at M is 40V.
The potential at N is 0.
The potential at M is positive, at N is negative.
The potential at M is higher than the potential at N by 40V.
The electric potential is a quantity characteristic of the electric field regarding
the ability to do work in a space with an electric field.
the ability to do work at a point.
the ability to exert force at a point.
the ability to exert force at all points in a space with an electric field.
The work done by the electric field when moving a charge of -2μC against the direction of an electric field of 1000V/m over a distance of 1 m is
2000J.
-2000J.
2mJ.
-2mJ.
The work done by the electric field when moving a charge of 10mC parallel to the field lines in a uniform electric field over a distance of 10cm is 1J. The magnitude of the electric field strength is
10000V/m.
1V/m.
100V/m.
1000V/m.
The work done by the electric field when moving a charge of 5.10-6C against the direction of an electric field of 1000V/m over a distance of 0.5m is
-2.5.10-3J.
-5.10-3J.
2.5.10-3J.
5.10-3J.
A capacitor is
a system consisting of two objects placed close to each other and separated by an insulating layer.
a system consisting of two conductors placed close to each other and separated by an insulating layer.
a system consisting of two conductors in contact with each other and surrounded by a dielectric.
a system of two conductors placed far enough apart.
Which statement is correct about a capacitor consisting of two parallel plates, one plate having an area twice that of the other? The plates are connected to the terminals of a battery.
The larger plate has a greater charge than the smaller plate.
The larger plate has less charge than the smaller plate.
The plates have equal charges but opposite signs.
The larger plate has an area twice that of the smaller plate.
Which expression below defines the capacitance of a capacitor?
Which quantity characterizes the ability of a capacitor to store charge?
The voltage between the two plates of the capacitor.
The dielectric constant.
The electric field strength inside the capacitor.
The capacitance of the capacitor.
The capacitance of a capacitor does not depend on
The shape and size of the two capacitor plates.
The distance between the two capacitor plates.
The nature of the two capacitor plates.
The dielectric between the two capacitor plates.
The unit of capacitance of a capacitor is
(C) Coulomb.
(V) Volt.
(F) Farad.
(J) Joule.
The energy of a capacitor is determined by which formula?
A capacitor has a capacitance of C = 2μF. When a voltage U = 5V is applied to the two plates of the capacitor, what is the charge on the capacitor?
2.10-6C.
2.10-5C.
10-6C.
10-5C.
Four identical capacitors with capacitance C are connected in series to form a capacitor bank. What is the capacitance of this capacitor bank?
Cb = 4C.
Cb = C/4.
Cb = 2C.
Cb = C/2.
Four identical capacitors with capacitance C are connected in parallel to form a capacitor bank. What is the capacitance of this capacitor bank?
Cb = 4C.
Cb = C/4.
Cb = 2C.
Cb = C/2.
Current is defined as
What is the capacitance of the capacitor assembly?
Cb = 4C.
Cb = C/4.
Cb = 2C.
Cb = C/2.
What is defined as electric current?
A directed flow of charges.
The movement of electric charges.
A directed flow of positive ions.
A directed flow of electrons.
What is the convention for the direction of electric current?
The direction of electron movement.
The direction of ion movement.
The direction of negative ions.
The direction of positive charges.
What is a direct current (DC)?
Current that does not change direction over time.
Current that changes intensity over time.
Current where the charge passing through a cross-section changes over time.
Current that has both direction and intensity that do not change over time.
What physical quantity characterizes the strength of electric current?
Charge.
Electric current.
Electron density.
Current intensity.
What is the expression for current intensity?
What is the current in metals?
The directed flow of positive ions.
The directed flow of electrons.
The directed flow of negative ions.
The directed flow of atoms.
What is the relationship between current intensity, density, and speed of charged particles?
I = Snv
I = Sve
I = nve/S
I = Snve
What is current intensity measured by?
Force gauge.
Electric meter.
Thermometer.
Ammeter.
What is the unit of resistance?
Ohm (Ω).
Ampere (A).
Volt (V).
Watt (W).
What is a variable resistor?
A resistor that can change its value and is used to adjust the direction of current in a circuit.
A resistor that can change its value and is used to adjust the intensity and direction of current in a circuit.
A resistor that can change its value and is used to adjust the intensity of current.
Calculate the number of electrons passing through a cross-section of a metal conductor in 1 second if a charge of 30C passes through that cross-section in 15 seconds.
1.25 x 10^19 electrons.
1.25 x 10^18 electrons.
2.25 x 10^18 electrons.
1.5 x 10^18 electrons.
The correct expression of Ohm's law for a circuit segment is
I = RU.
U = RI.
The graph representing the dependence of current intensity on the voltage between two ends of a metal wire resistor is
a straight line passing through the origin.
a curve passing through the origin.
a straight line not passing through the origin.
a curve not passing through the origin.
A circuit segment consists of a resistor R1 = 100Ω connected in series with a resistor R2 = 300Ω. The equivalent resistance of the circuit segment is
Rtđ = 200Ω.
Rtđ = 300Ω.
Rtđ = 400Ω.
Rtđ = 500Ω.
Choose the correct answer. The intensity of the electric current is measured by
Dynamometer.
Electric meter.
Thermometer.
Ammeter.
Choose the incorrect answer?
The current intensity is measured by an ammeter.
To measure the current intensity, the ammeter must be connected in series with the circuit.
The current through the ammeter enters the positive terminal and exits the negative terminal of the ammeter.
The current through the ammeter enters the negative terminal and exits the positive terminal of the ammeter.
The current flowing through a resistor R = 5Ω is 0.5A. The voltage across the two ends of the resistor is
2.5V.
25V.
0.5V.
10V.
Two identical resistors connected in parallel have an equivalent resistance of 2Ω. If those resistors are connected in series, what is the equivalent resistance?
What is the voltage across the two ends of the resistor?
2.5V
25V
0.5V
10V
If two identical resistors are connected in series, what is their equivalent resistance?
2Ω
4Ω
8Ω
16Ω
When both bulbs are lit normally, what can be said about the current through the bulbs?
The current through bulb Đ1 is twice that through bulb Đ2.
The current through bulb Đ2 is twice that through bulb Đ1.
The current through bulb Đ1 is equal to the current through bulb Đ2.
The current through bulb Đ2 is four times that through bulb Đ1.
What is the ratio of the resistances R1 and R2 of the two bulbs when they are lit normally?
R1 = 4R2
4R1 = R2
R1 = 16R2
16R1 = R2
Which graph represents the relationship between current (I) and charge (q) through a conductor of constant current?
Figure 3
Figure 1
Figure 2
Figure 4
What factor does the heat power in a conductor not depend on?
Voltage across the conductor
Current through the conductor
Resistance of the conductor
Time current flows through the conductor
What is the device used to measure electrical energy consumption?
Voltmeter
Ammeter
Electric meter
Ohmmeter
What is the resistance of a bulb rated at (220V - 100W)?
488Ω
448Ω
484Ω
848Ω
What is the heat generated in 2 minutes when a current of 2A flows through a pure resistance of 100Ω?
48kJ
400J
24kJ
24J
What is the total power consumed when two identical resistors are connected in series to a voltage source U?
What is the energy consumed when a current of 2A flows through a pure resistor of 100Ω for a certain time?
48kJ
400J
24kJ
24J
If two identical resistors are connected in series to a power source with voltage U, the total power consumed is 20W. If they are connected in parallel to this source, what is the total power consumed?
5W
40W
10W
80W
Choose the correct conclusion regarding the V-I characteristic curve of two conductors.
Cannot be compared
Which of the following statements is true about the function of a power source?
Used to create and maintain voltage to sustain current in the circuit.
Used to create negative ions.
Used to create positive ions.
Used to create negative ions flowing in the conductor.
Which of the following statements is false regarding the electromotive force of a power source?
The electromotive force of a power source is a quantity that characterizes the ability to do work of the power source.
The electromotive force of a power source is measured by the ratio.
The unit of electromotive force is volt (V).
The electromotive force of a power source characterizes the ability to charge the power source.
The work done by a power source is
the amount of charge that the power source generates in 1 second.
the work done by the external force moving the charge inside the source.
the work done by the current in a closed circuit generated in 1 second.
the work done by the current when moving one unit of charge in a closed circuit.
The quantity that characterizes the ability to do work of a power source and is measured by the ratio of the work done by the external force moving a positive charge q inside the power source from the negative to the positive terminal is called
Voltage U
Heat released in the circuit segment.
Electric field strength E
Electromotive force of the source.
An electric source has an electromotive force of
What is the relationship between the electromotive force ξ, the work A, and the charge q in an electric source?
A = q.ξ.
q = A.ξ.
ξ = q.A.
A = ξ.q2.
What are the possible units for the electromotive force of an electric source besides volts (V)?
Seconds per coulomb (s/C).
Joules per coulomb (J/C).
Coulombs per joule (C/J).
Coulombs per second (C/s).
In a closed circuit consisting of a power source with electromotive force and internal resistance r, what is the expression for the current in the main circuit?
.
I = +.
.
.
A constant source has an electromotive force of 6V and does 1080J of work in 5 minutes. What is the current through this source?
0.6A.
36A.
1.8A.
3.6A.
For a circuit consisting of a resistor R1 = 100Ω in series with a resistor R2 = 200Ω, if a voltage U is applied across the circuit, what is the voltage across R1 if it is 6V?
U = 12V.
U = 18V.
U = 6V.
U = 24V.
In a closed circuit with a power source of 1.5V and an internal resistance of 0.5Ω in series with an external resistor of 2.5Ω, what is the current in the entire circuit?
3A.
0.6A.
0.5A.
2A.
In a circuit with a power source of 9V and an external resistor RN = 4Ω, if the total current in the circuit is 2A, what is the internal resistance of the source?
0.5Ω.
4.5Ω.
1Ω.
2Ω.
An unknown resistor R1 is connected in parallel with a resistor R2 = 30. A power source of 12V and internal resistance r = 0.5 is connected to this circuit. The current through the main circuit is 1.
A resistor R1 is unknown, connected in parallel with resistor R2 = 30. A power source with voltage = 12V and internal resistance = 0.5 is connected to the circuit, the current through the main circuit is 1.5A. What is the value of the unknown resistor?
10
12
15
30
In a closed circuit where the external resistance is 10Ω, the internal resistance is 1Ω and the current is 2A. The voltage between the two terminals of the source and the electromotive force of the source are respectively:
10V and 12V
20V and 22V
12V and 10V
22V and 20V
An electric fan is used with a voltage of 220V, and the current flowing through the fan is 5A. Calculate the electricity bill for using the fan for 30 days, each day using 30 minutes. The electricity price is 600 VND/kWh.
99000 VND
12600 VND
9900 VND
126000 VND
A circuit has two resistors R1 = 2.5Ω and R2 = 5Ω connected in parallel with a power source having internal resistance of 2.5Ω. The efficiency of the power source is:
60%
80%
75%
65%
A power source has an electromotive force ξ = 6V, r = 1Ω connected with an external resistor RN = 4Ω forming a closed circuit. The power consumed in the external circuit is:
5.76W
7.2W
1.44W
4.5W
Using a power source to light two bulbs with resistances R1 = 2 and R2 = 8, the power consumed by the two bulbs is the same. The internal resistance of the power source is:
r = 2
r = 3
r = 4
r = 6
A power source with internal resistance 1.5 is connected with an external resistor RN = 6 forming a closed circuit. The voltage between the two terminals of the power source is 12V. The electromotive force of the power source is:
= 12V
= 15V
= 16V
= 18V
A power source has an electromotive force = 6V and r = 0.5 connected with an external resistor RN = 2. The heat generated in the entire circuit during the time is:
What is the electromotive force of the power source?
12V
15V
16V
18V
A power source has an electromotive force of 6V and r = 0.5 connected to an external resistor RN = 2. What is the heat released in the circuit over 1.5 minutes?
1036.8J
685.7J
1269J
1296J
Given the circuit diagram, the power source has an electromotive force of 12V and r = 2. The bulb is rated D(6V - 6W). What are the values of Rx in the circuit and the power consumed on Rx?
Rx = 4 ; Px = 4W
Rx = 2 ; Px = 2W
Rx = 2 ; Px = 4W
Rx = 4 ; Px = 2W
Calculate the capacitance of the capacitor bank given the capacitors have capacitances C1 = C3 = 2C2 = 6F, C4 = 4F, C5 = 2F. The charge of the capacitor is Q3 = 18.10-6C.
Calculate the voltage UAB given the capacitor bank with capacitances C1 = C3 = 2C2 = 6F, C4 = 4F, C5 = 2F and voltage U2 = 6V.
In the circuit diagram, the power source has an electromotive force and internal resistance of 18V and r = 2. The external circuit has R1 = 4, R2 = 4, R3 = 15, bulb D(6V - 6W) and ammeter RA = 0. What is the reading of the ammeter?
In the circuit diagram, the power source has an electromotive force and internal resistance of 15V and r = 2. The external circuit has R1 = 4, R2 = 15, R3 = 2, bulb D(6V - 4.5W) and ammeter RA = 0. What is the reading of the ammeter?
