# Đề thi học kì 1 môn Vật lý 11 năm học 2023

The exam papers for the 1st semester of grade 11 are compiled with a very diverse question structure that closely follows the content of the curriculum in the textbook. Hopefully, this will be a useful document to help teachers and students review, consolidate knowledge, and prepare well for the upcoming 11th semester exam.

## 1. Exam questions for the first semester of the 11th semester of the school year 2023-2024:

### 1.1. Set of topics 1:

Question 1. Circuit consisting of resistor Rfirst = 1(Ω) in series with resistor R2 = 3(Ω), the total resistance of the circuit is:

A. CHEAPTM= 3 (Ω).
B. CHEAPTM= 1(Ω).
C. CHEAPTM = 2 (Ω).
D. CHEAPTM = 4 (Ω).

Verse 2. A point charge q=10-4C placed at a point A in an electric field with electric field strength E=1000V/m is acted upon by an electric field force of magnitude:

A. F=0.2N
BF=0.1N
C. F=0.3N
D. F=0.4N

Verse 3. Gases do not conduct electricity because:

A. there are many positive and negative ions.
B. has many free electrons and holes.
C. Gas molecules are in an electrically neutral state, in a gas there are no charge carriers.
D. has many free electrons.

Verse 4. The power of a power source is measured in which of the following units:

A. Watt (W)
B. Coulomb (C)
C. Jun (J)
D. Newton (N)

Question 5. The basic charge carriers in a gas in the presence of an ionizing agent are:

A. free electrons.
B. positive and negative ions.
C. free electrons and holes.
D. positive ions, negative ions and free electrons.

Verse 6. Work of electric field force on charge q=2.10-4C displacement between two points with potential difference U=1000V is:

A. A= 0.5J
B. A=2J
C. A=0.2J
D. A=1J

Verse 7. A capacitor has a capacitance C. When a potential difference U is placed on two plates of the capacitor, the capacitor’s charge is:

A. Q=C/U
B. Q=1/2CU2
C. Q=U/C
D. Q=CU

Verse 8. In a uniform electric field there is electric field strength E, let d be the distance between two projections of points M and N on a line of force. The potential difference between two points M and N is:

A. U = Ed.
B.
C.
D.U = Ed2 .

Verse 9. A positive point charge Q in a vacuum causes an electric field of magnitude E=30000V/m at a point M at a distance r=30cm from the charge. The magnitude of charge Q is

A. 3.10-5OLD
B.3.10-7OLD
C. 3.10-6OLD
D. 3.10-8OLD

Verse 10. In the SI system, the unit of electric field strength is:

A. Volt per coulomb (V/C)
B. Volts (V)
C. Newtons per meter (N/m)
D. Volts per meter (V/m).

Verse 11.The electromotive force of the power source is a characteristic quantity for:

A. its ability to charge two poles.
B. the electrical power’s ability to store an electric charge.
C. power source’s ability to do work
D. the ability to apply force of the power source.

Verse 12. Power consumption is measured with which of the following electrical meters?

A. Electrostatic meter.
B. electric meter.
C. voltmeter.
D. ammeter .

Verse 13. Which of the following units of capacitance is TRUE?

A. 1nF = 10-12F
B. 1nF=10-3F
C. 1nF = 10-9F
D. 1nF=10-6F

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Verse 14. The resistance of a light bulb D: 6V – 6W has a value of:

A. 6Ω
B. 1Ω
C.3Ω
D. 2Ω

Verse 15. A positive charge of mass m=0.01g of charge q=8.10-6C moves from point M to point N along an electric field line under the action of an electric force in a uniform electric field. indicates that the velocity at M is v1=0. The potential difference between two points M and N is UMN = 1000V. (Ignoring the effect of gravity) The velocity of the charge at N is:

A. 40 m/s
B. 1.26 m/s
C. 80m/s.
D. 4 m/s

……

### Answer:

I.MULTIPLE-CHOICE

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II. ESSAY

Question 1:

a) Correctly write coulomb’s law. 0.5 dong

Replace the correct number, calculate the result F=7,2.10-4 N……………………0.5d

b. Can draw representations

Correct calculation of Efirst=144000V/m

E2=72000V/m…………….0.25đ

EUSA=Efirst-E2=72000V/m…………………….0.25đ

Verse 2: a) Students correctly calculate CHEAPWOMEN=4(Ω)……………………………………………………0,5d

I=2A…………………….0.5đ

b) Students switch to the correct circuit ((R4// R2)ntR1)//R3

Calculate the external circuit resistance:WOMEN= 2(Ω)

Current flow through the main circuit: I=3A………………0.25đ

Current flowing through R4: I4=0.75A

Ammeter reading IA= II4=2.25A ……0.25đ

### 1.2. Set of topics 2:

A/ TEST (6 points)

Question 1: Which statement is incorrect?

A. According to electron theory, a positively charged object is an object that lacks electrons.
B. According to electron theory, a negatively charged object is an excess of electrons.
C. According to electron theory, a positively charged object is an object that receives more positive ions.
D. According to electron theory, an object that is negatively charged is an object that receives more electrons.

Verse 2: The work done by the electric force to move a positive charge from one point to another in the electric field, independent of

A. the position of the beginning and the end of the path.
B. electric field strength.
C. the shape of the path.
D. the magnitude of the moving charge.

Verse 3: Know the potential difference UM N = 3 V. Which of the following equations is definitely true?

A. VM = 3 V.
B. VN = 3 V.
C. VM – VN = 3 V.
D. VN – VM = 3 V.

Question 4: Let Q, C and U be the charge, capacitance and potential difference between the two plates of a capacitor. Which of the following statements is correct?

A. C is proportional to Q.
B. C is inversely proportional to U.
C. C depends on Q and U.
D. C does not depend on Q and U.

Question 5: If the distance from the point charge to the point in question is doubled, the electric field strength at that point will be

A. reduced by 2 times.
B. increased by 2 times.
C. reduced by 4 times.
D. increased by 4 times.

Question 6: Two small charged metal spheres q1 = 5 μC and q2 = – 3 μC of the same size are brought into contact and placed in a vacuum 5 cm apart. The electrostatic force between them after contact is

A. 4.1 N.
B. 5.2 N.
C. 3.6 N.
D. 1.7 N.

Verse 7: Heat released in a conductor when an electric current is passed through it

A. proportional to the magnitude of the current flowing through the conductor.
B. is proportional to the square of the current flowing through the conductor.
C. is inversely proportional to the magnitude of the current flowing through the conductor.
D. is inversely proportional to the square of the current flowing through the conductor.

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Verse 8: Conventional current direction is

A. the direction of displacement of electrons.
B. the direction of displacement of the ions.
C. displacement direction of negative ions.
D. direction of displacement of positive charges.

Verse 9: In parallel wiring of the same sources,

A. The electromotive force of the power supply remains constant but the internal resistance decreases.
B. the electromotive force of the power supply increases but the internal resistance remains unchanged.
C. The electromotive force of the power supply and the internal resistance both increase.
D. the electromotive force of the power supply and the internal resistance are both constant.

Question 10: In a closed circuit, how does the voltage of the external circuit UN depend on the resistance RN of the external circuit?

A. UN increases as RN increases.
B. UN decreases at first, then increases as RN gradually increases from 0 to infinity.
C. UN increases when RN decreases.
D. UN does not depend on RN .

Verse 11: The power source has an emf of 12 V, when it is connected to a light bulb to form a closed circuit, it provides a current of 0.8 A. The work of this power source in 15 minutes is

A. 8640 J.
B. 144 J.
C. 9.6 J.
D. 180 J.

Verse 12: A power source with emf E = 6 V and internal resistance r = 1 is connected to an external circuit with resistance R = 2 to form a closed circuit. The voltage of the external circuit is

A. 4 V.
B. 2 V.
C. 6 V.
D. 3 V.

Verse 13: Choose an incorrect answer:

A. Electric arc is a self-powered discharge process.
B. Electric arc occurs in gas at high pressure.
C. An electric arc occurs in a gas at normal or low pressure between two electrodes with a small potential difference.
D. The accompanying electric arc radiates heat and shines very strongly.

Verse 14: superconductor is a phenomenon

A. the thermistor coefficient of the wire suddenly drops to zero.
B. the resistance of the conductor suddenly drops to zero.
C. the current through the conductor suddenly drops to zero.
D. The free electrons in the conductor suddenly stop.

Verse 15: The charge carrier in a semiconductor is

A. positive ions.
B. negative ions.
C. free electro.
D. conduction electrons and holes.

Verse 16: In semiconductors, which type of semiconductor has the same density of free electrons and holes?

A. Pure Semiconductor.
B. P-type semiconductor.
C. n-type semiconductor.
D. P-type semiconductor and n-type semiconductor.

Verse 17: To prevent lightning, people usually do

A. reduce the area of ​​thunderstorm clouds.
B. Lightning protection poles attached to the top of high-rise buildings.
C. reduce the amperage in lightning.
D. reduced electric field in the air.

Verse 18: The thermistor coefficient of copper is α = 0.004 K-1. A copper wire has a resistance of 74 at a temperature of 50 0C, when the temperature increases to 100 0C, the resistance of that wire is

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A. 66 Ω.
B. 76 Ω.
C. 88.8 Ω.
D. 96 yen.

B/ OBJECTIVE (4 points)

Lesson 1: Electrical circuit diagram like figure

E = 12.5 V; r = 0.4 W, Rfirst = 8 W; CHEAP2 = 24 W; bulb D has the number 6 V- 4.5 W.

a. Calculate the current through the main circuit?

b. How bright is the light? Why?

c. Calculate the power and efficiency of the source?

Lesson 2: (1 point) Two electrolytic cells are connected in series in an electrical circuit. The first bottle contains CuSO . solution4 with Cu anode, the second flask contains AgNO . solution3 with Ag anode. After a period of electrolysis, the cathode mass of both flasks increased to 2.8 g.

a) Calculate the increased cathode mass of each vessel.

b) Calculate the electrolysis time knowing the current in the circuit is I = 0.5A.

(Tell Cu = 64 valency of Cu equals 2, Ag = 108 valency of Ag equals 1)

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## 2. Matrix of exam questions for the 1st semester of Physics 11:

Content
knowledgeKnowledge unitKnowledge and skills standardsNumber of questions by level of awarenessNoteReceive
knowPine
understandLuck
useLuck
high usefirstCu – Feather LawLaw contentApply the content of calculating the electric force when changing the distancefirst2Electric force demonstrationDraw the electric force between two charges0.53Electric force magnitudeApply the formula of the law to calculate the magnitude of the electric force0.56Constant currentElectricity supplyExplain the opposite charge between the two poles of the source.first7Electrical Power. Power capacityState the content and apply the formula of Jun-Lens law. Expression of work and capacity of the power source; conclude the brightness of the lamp.first0.50.58Ohm’s Law for the whole circuitState the content and apply the formulafirstfirstElectric currents in environmentscurrents in metalsState the nature of electric current; explain the dependence of metal resistance on temperature; Calculate the thermodynamic capacity.0.5first0.5Current in the electrolyteState the nature of electric current in an electrolyte; identify objects that make Katot, Anode, metal of salt in electrolyte solution.0.5

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## 3. The role of physics for professions in society:

Physics plays a very important role for professions in society.

– Contributing to economic development and GDP growth.

– Improving the quality of human life thanks to modern equipment and utensils in daily life.

– Improve production efficiency in factories and enterprises through advanced and modern equipment and machines.

Reducing environmental pollution thanks to advanced and high-performance equipment such as electric cars, electric motorbikes, etc.

– Life, security and order are enhanced thanks to the surveillance camera system.

– Reduce administrative procedures and paperwork thanks to the national data management system.

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