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Solve Exercise 1 on Page 44 SGK Physics 11
Problem Statement:
When an electric current flows through a conductor, what force do the electric charge carriers participate in motion under?
Solution:
When an electric current flows through a conductor, the electric charge carriers participate in motion under the influence of the electric field force: positively charged particles move in the direction of the electric field, while negatively charged particles move in the opposite direction of the electric field.
Solve Exercise 2 on Page 44 SGK Physics 11
Problem Statement:
What are the ways to determine if an electric current is flowing through a conductor?
Solution:
To detect whether an electric current is flowing through a conductor, the simplest method is to use a sensitive ammeter to measure the current. Another method is to use the magnetic field of the current: place a compass needle (which can freely rotate on a sharp point) near the conductor, if the compass needle deviates from the north-south direction, then there is an electric current flowing through the conductor.
The current intensity is determined by which formula?
Problem Statement:
How is the current intensity determined?
Solution:
Why do different power sources maintain different electric charges at their two terminals and thus maintain the potential difference between their two terminals?
Problem Statement:
How do different power sources maintain different electric charges at their two terminals and thus maintain the potential difference between their two terminals?
Solution:
Why do different power sources maintain different electric charges at their two terminals and thus maintain the potential difference between their two terminals?
Solution:
The reason why different power sources maintain different electric charges at their two terminals and thus maintain the potential difference between their two terminals is because inside the power source, positive electric charges move from the low potential (negative terminal) to the high potential (positive terminal) contrary to the direction of the electric field force between the two terminals. This movement is carried out under the influence of a force other than the electric field force.
Problem Statement:
What quantity characterizes the ability of internal force to perform work within a power source? How is this quantity determined?
Solution:
The quantity that characterizes the ability of internal force to perform work within a power source is the electromotive force (EMF) of the power source.
- The electromotive force (EMF) C of a power source is measured by the ratio of the work A done by the internal force when displacing a positive charge q against the electric field and the magnitude of that charge q:
Solution:
Problem:
Which device is used to measure electric current intensity?
A. Dynamometer B. Electric meter
C. Thermometer D. Ammeter
Solution:
Choose D.
Electric current intensity is measured by an Ammeter.
Solve Exercise 7 on Page 45 of Physics 11 Textbook
Problem Statement:
Which unit is used to measure electric current intensity?
A. Newton (N). B. Ampere (A).
C. Jun (J). D. Oat (W).
Lời giải:
Choose B.
The unit for measuring electric current intensity is Ampere (A).
Solution:
Problem:
Choose the correct statement.
Electrochemical cells have:
A. both terminals are made of the same conductor material.
B. both terminals are made of different conductor materials.
C. one terminal is a conductor and the other terminal is an insulator.
D. both terminals are insulators.
Explanation:
Choose B.
The electrolytic cell has two terminals made of different conductor materials.
Solution to Exercise 9 on Page 45 of Physics Grade 11 Textbook
Problem Statement:
What solution are the electrodes of the electrolytic cell immersed in?
A. Only a salt solution.
B. Only an acid solution.
C. Only a Base solution.
D. One of the above-mentioned solutions.
Solution:
Choose D.
Problem 10 Solution of Physics 11
Problem:
In electrochemical cells, which form of energy is converted into electrical energy?
A. Thermal energy.
B. Gravitational potential energy.
C. Chemical energy.
D. Mechanical energy.
Solution:
Choose C.
In electrochemical cells, there is a conversion from chemical energy to electrical energy.
Solution to Exercise 11 on page 45 of Physics 11 textbook:
Exercise:
Which unit is used to measure electromotive force?
A. Coulomb (C).
B. Volt (V).
C. Hertz (Hz).
D. Ampere (A).
Solution:
Choose B.
Solution to Exercise 12 on page 45 of Physics Grade 11 Textbook
Problem:
Why can we consider Lead-Acid Battery as an electrochemical cell?
How does a Lead-Acid Battery function to enable multiple uses?
Solution:
An accumulator consists of 2 electrodes immersed in an electrolyte.
For instance, a Lead-Acid Battery: the positive electrode is made of lead dioxide and the negative electrode is made of lead, the electrolyte is diluted sulfuric acid.
=> Hence, the Lead-Acid Battery is an electrochemical cell.
The operation of a Lead-Acid Battery follows the principle of reversible chemical reactions: It stores energy during charging and releases this energy during discharging.
An accumulator can be used multiple times.
Solution to Exercise 13 on page 45 of Physics 11 textbook
Problem:
A charge of 6.0mC moves through the cross-sectional area of a conductor in a time interval of 0.2s. Calculate the current intensity flowing through this conductor.
Solution:
Solving problem 15 from page 45 of Physics textbook for grade 11
Problem statement:
The electromotive force (EMF) of a battery is 1.5V. Calculate the work done by the electric force when moving a charge of +2 C from the negative terminal to the positive terminal inside the battery.
Solution:
The work done by the electric force is: A = ξq= 3 J
In Chapter I, Electric Charge, Electric Field, you study the method of solving some circuit problems. Refer to Exercise Solution on page 62 Physics Grade 11 for better understanding Physics Grade 12.
Connecting power sources into a circuit is the next part of Chapter I, Electric Charge, Electric Field for Physics Grade 11. Also, refer to Exercise Solution on page 58 Physics Grade 11 to strengthen your knowledge and perform well in Physics Grade 11.
