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Which of the following is unit of energy
A. Newton metre
B. Joule
C. Kilowatt hours
D. Kilowatt
A. Newton metre
B. Joule
C. Kilowatt hours
D. Kilowatt
- a)(a), (b) and (c) are correct
- b)(a) and (b) are correct
- c)(b) and (c) are correct
- d)All of these
Correct answer is option 'A'. Can you explain this answer?
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Which of the following is unit of energyA. Newton metreB. JouleC. Kilo...
Unit of Energy
Correct Options:
- Newton metre
- Joule
- Kilowatt hours
Explanation:
The unit of energy is a measure of the ability of a system to do work or produce heat. The correct options for the unit of energy are:
- Newton metre: This is the unit of energy in the metric system. It is defined as the amount of energy transferred when a force of one newton is applied over a distance of one metre.
- Joule: This is the SI unit of energy. It is defined as the amount of energy transferred when a force of one newton is applied over a distance of one metre. It is the most commonly used unit of energy.
- Kilowatt hours: This is a unit of energy commonly used for measuring electricity consumption. It is equal to the energy consumed by a 1 kilowatt (kW) device operating for one hour.
Therefore, options A, B, and C are correct. The unit of energy can be measured in Newton metre, Joule, and Kilowatt hours.
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Community Answer
Which of the following is unit of energyA. Newton metreB. JouleC. Kilo...
Unit of Energy:
The unit of energy is the basic quantity used to measure energy. It represents the amount of work done or the capacity to do work. In the International System of Units (SI), the unit of energy is the joule (J). However, there are other units that are also commonly used to express energy.
Options:
A. Newton metre
B. Joule
C. Kilowatt hours
D. Kilowatt
Explanation:
Let's analyze each option to determine which ones are units of energy.
A. Newton metre:
- The newton metre (N·m) is a unit of torque or moment. It represents the product of a force (newton) and a displacement (meter). Torque is not directly related to energy, so this is not a unit of energy.
B. Joule:
- The joule (J) is the SI unit of energy. It is defined as the amount of work done when a force of one newton is applied over a distance of one meter in the direction of the force. This is the correct unit of energy.
C. Kilowatt hours:
- The kilowatt hour (kWh) is a unit of electrical energy. It represents the amount of energy consumed or produced when a power of one kilowatt is sustained for one hour. This is also a valid unit of energy.
D. Kilowatt:
- The kilowatt (kW) is a unit of power, not energy. Power represents the rate at which energy is consumed or produced, while energy is the total amount of work done. Therefore, this is not a unit of energy.
Conclusion:
From the given options, the correct units of energy are:
- Joule (J)
- Kilowatt hours (kWh)
Therefore, the correct answer is option (b) - (a) and (b) are correct.
The unit of energy is the basic quantity used to measure energy. It represents the amount of work done or the capacity to do work. In the International System of Units (SI), the unit of energy is the joule (J). However, there are other units that are also commonly used to express energy.
Options:
A. Newton metre
B. Joule
C. Kilowatt hours
D. Kilowatt
Explanation:
Let's analyze each option to determine which ones are units of energy.
A. Newton metre:
- The newton metre (N·m) is a unit of torque or moment. It represents the product of a force (newton) and a displacement (meter). Torque is not directly related to energy, so this is not a unit of energy.
B. Joule:
- The joule (J) is the SI unit of energy. It is defined as the amount of work done when a force of one newton is applied over a distance of one meter in the direction of the force. This is the correct unit of energy.
C. Kilowatt hours:
- The kilowatt hour (kWh) is a unit of electrical energy. It represents the amount of energy consumed or produced when a power of one kilowatt is sustained for one hour. This is also a valid unit of energy.
D. Kilowatt:
- The kilowatt (kW) is a unit of power, not energy. Power represents the rate at which energy is consumed or produced, while energy is the total amount of work done. Therefore, this is not a unit of energy.
Conclusion:
From the given options, the correct units of energy are:
- Joule (J)
- Kilowatt hours (kWh)
Therefore, the correct answer is option (b) - (a) and (b) are correct.
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