Interpretation:
Units for the electric power should be determined as the combination of fundamental S. I. units.
Concept Introduction:
SI stands for International System of units.
SI defines 7 units of different quantities as the basic units from which all other SI units are derived. These basic units are:
| Quantity | Unit |
| Mass | Kilogarm (Kg) |
| Length | Metre (m) |
| Time | Second (s) |
| Electric current | Ampere (A) |
| Temperature | Kelvin (K) |
| Luminous intensity | Candela |
| Amount of substance | Mole |
Answer to Problem 1.1P
Units for the electric power as the combination of fundamental S. I. units is -
Explanation of Solution
Given Information:
The given quantity is Electric Power.
- Electric power is defined as the rate at which electrical energy is transferred by a circuit.
- SI unit of Electric Power − Watt
But watt is not a fundamental unit, so it has to be converted into fundamental units as following-
Electric Power =
Therefore, unit of electric power =watt =
=
Interpretation:
The units for the electric charge as the combination of fundamental S. I. units should be determined.
Concept Introduction:
SI stands for International System of units.
SI defines 7 units of different quantities as the basic units from which all other SI units are derived. These basic units are:
| Quantity | Unit |
| Mass | Kilogarm (Kg) |
| Length | Metre (m) |
| Time | Second (s) |
| Electric current | Ampere (A) |
| Temperature | Kelvin (K) |
| Luminous intensity | Candela |
| Amount of substance | Mole |
Answer to Problem 1.1P
Units for the electric charge as the combination of fundamental S. I. units is -
Explanation of Solution
Given Information:
The given quantity is Electric Charge.
- It is a physical property which enables the substance to experience a force in the magnetic field. Its SI unit is Coulomb (C), but it is also not a fundamental unit. Thus it is need to be converted into fundamental units.
1 coulomb = 1 ampere-second.
Therefore, unit of electric charge =
Interpretation:
The units for the electric potential difference as the combination of fundamental S. I. units should be determined.
Concept Introduction:
SI stands for International System of units.
SI defines 7 units of different quantities as the basic units from which all other SI units are derived. These basic units are:
| Quantity | Unit |
| Mass | Kilogarm (Kg) |
| Length | Metre (m) |
| Time | Second (s) |
| Electric current | Ampere (A) |
| Temperature | Kelvin (K) |
| Luminous intensity | Candela |
| Amount of substance | Mole |
Answer to Problem 1.1P
Units for the electric potential difference as the combination of fundamental S. I. units is -
Explanation of Solution
Given Information:
The given quantity is Electric Potential Difference.
- It is the amount of work done in carrying a charge from one point to another in an electric field. Its SI unit is Volt (V).
Therefore, unit of electric potential difference = V =
Interpretation:
The units for the electric resistance as the combination of fundamental S. I. units should be determined.
Concept Introduction:
SI stands for International System of units.
SI defines 7 units of different quantities as the basic units from which all other SI units are derived. These basic units are:
| Quantity | Unit |
| Mass | Kilogarm (Kg) |
| Length | Metre (m) |
| Time | Second (s) |
| Electric current | Ampere (A) |
| Temperature | Kelvin (K) |
| Luminous intensity | Candela |
| Amount of substance | Mole |
Answer to Problem 1.1P
Units for the electric resistance as the combination of fundamental S. I. units is -
Explanation of Solution
Given Information:
The given quantity is Electric Resistance.
- Electric Resistance is the measure of the difficultyto pass an electric current through the substance. It unit is Ohms (O).
In fundamental units, its unit =
Interpretation:
The units for the electric capacitance as the combination of fundamental S. I. units should be determined.
Concept Introduction:
SI stands for International System of units.
SI defines 7 units of different quantities as the basic units from which all other SI units are derived. These basic units are:
| Quantity | Unit |
| Mass | Kilogarm (Kg) |
| Length | Metre (m) |
| Time | Second (s) |
| Electric current | Ampere (A) |
| Temperature | Kelvin (K) |
| Luminous intensity | Candela |
| Amount of substance | Mole |
Answer to Problem 1.1P
Units for the electric capacitance as the combination of fundamental S. I. units is -
Explanation of Solution
Given Information:
The given quantity is Electric Capacitance.
- Electric Capacitance is the ratio of the change in electric charge in the system to the change in voltage. Its SI unit is Farad which is not a fundamental SI unit.
In fundamental units, its unit
Conclusion:
Unit for the Electric Capacitance as the combination of fundamental S. I. units is
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Chapter 1 Solutions
Introduction to Chemical Engineering Thermodynamics
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