Buzz
Solution to Exercise 1, page 44 Physics 11 Textbook
Problem Statement:
When electric current flows through a conductor, which force influences the motion of the charged particles?
Solution:
When electric current flows through a conductor, the charged particles 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.
Solution to Exercise 2, page 44 Physics 11 Textbook
Problem Statement:
How can you determine if there is an electric current flowing through a conductor?
Solution:
To identify whether there is an electric current flowing through a conductor or not, the simplest way is to use a sensitive ammeter to measure the current. Another method is to utilize the magnetic field of the electric current: place a compass needle (which can freely rotate on a pivot) near the conductor, if the compass needle deviates from the north-south direction, then there is an electric current flowing through the wire.
The current intensity is determined by which formula?
Problem Statement:
How is the current intensity determined?
Solution:
Why do power sources maintain different electric charges at their two terminals and thus maintain an electric potential difference between their terminals?
Problem Statement:
How do power sources maintain different electric charges at their two terminals, thereby maintaining an electric potential difference between their terminals?
Solution:
Why do power sources maintain different electric charges at their two terminals and thus maintain an electric potential difference between their terminals?
Solution:
Power sources maintain different electric charges at their two terminals and thus maintain an electric potential difference between their terminals because inside the power source, positively charged particles move from a region of low potential (negative terminal) to a region of high potential (positive terminal) against the direction of the electric field between the two terminals. This movement is carried out under the influence of a force (not the electric field).
Problem Statement:
Problem Statement:
What quantity characterizes the ability of the mysterious force inside a power source to perform work? How is this quantity determined?
Solution:
The quantity characterizing the ability of the mysterious force inside a power source to perform work is the electromotive force of the power source.
Choose B.
Problem Statement:
Which instrument is used to measure electric current intensity?
Solution:
C. Thermometer D. Ammeter
Solution:
Choose D.
Electric current intensity is measured by an Ammeter.
Solution to Exercise 7 on page 45 of Physics Grade 11 textbook
Problem Statement:
How is electric current intensity measured?
A. Newton (N). B. Ampere (A).
Solution:
C. Jun (J). D. Watt (W).
Choose B.
The unit of electric current intensity is Ampere (A).
Question:
Choose the correct statement.
Pin electrochemical cell has:
A. Both electrodes are made of the same conductor material. B. Both electrodes are made of different conductor materials. C. One electrode is a conductor and the other is an insulator. D. Both electrodes are insulators.
A. Both electrodes are made of the same material.
B. Both electrodes are made of different materials.
C. One electrode is a conductor and the other is an insulator.
D. Both electrodes are insulators.
Explanation:
Choose B.
Lead-acid batteries have two electrodes made of different materials.
Solution to Exercise 9, page 45 of Physics 11 Textbook
Problem:
Which solution are the electrodes of an electrochemical cell immersed in?
A. Only a salt solution.
B. Only an Acid solution.
C. Only a Base solution.
D. One of the above solutions.
Solution:
Choose D.
Exercise 10 Solution, Physics 11 Textbook, Page 45
Question:
In electrochemical cells, which form of energy is converted into electrical energy?
A. Thermal energy.
B. Potential energy.
C. Chemical energy.
D. Mechanical energy.
Solution:
Choose C.
In electrochemical cells, there is a conversion of chemical energy into electrical energy.
Solution to Exercise 11 on page 45 of Physics 11 textbook
Problem:
What unit is used to measure electromotive force?
A. Coulomb (C).
B. Volt (V).
C. Hertz (Hz).
D. Ampere (A).
Solution:
Select B.
Solution to problem 12 on page 45 of Physics 11 textbook
Problem:
Why can we consider Lead-Acid Battery as an electrochemical cell?
How does the Lead-Acid Battery function to allow for multiple uses?
Solution:
Lead-acid batteries consist of two electrodes immersed in an electrolyte.
For instance, in a lead-acid battery, the positive electrode is made of lead dioxide while the negative electrode is made of lead, and the electrolyte is a dilute sulfuric acid solution.
=> Lead-acid batteries are electrochemical cells.
Lead-acid batteries operate based on the principle of reversible chemical reactions: They store energy during charging and release this energy during discharging.
An accumulator can be used repeatedly.
Problem 13 Solution, Physics 11 Textbook Page 45
Problem:
A charge of 6.0 mC moves through the cross-section of a conductor in a time interval of 0.2 s. Calculate the current intensity flowing through this conductor.
Solution:
Exercise 14 solution on page 45 of Physics textbook grade 11
Problem Statement:
During the operating time of closing the switch to run a refrigerator, the average current intensity measured is 6A. The duration of the switch current is 0.50s. Calculate the electric charge passing through the cross-sectional area of the conductor powering the refrigerator motor.
Solution:
Exercise 15 solution on page 45 of Physics textbook grade 11
Problem Statement:
The electromotive force 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 power source.
Answer:
The work done by the mysterious force is: A = ξq = 3 J
Chapter I, Electric Charge, Electric Field, is where you tackle problems on circuitry. Refer to Exercise 62 hints in Physics 11 to master Physics 12.
Next up is assembling electrical sources into circuits, a crucial part of Chapter I, Electric Charge, Electric Field in Physics 11. Check out Exercise 58 hints in Physics 11 to strengthen your grasp and excel in Physics 11.
