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Microwave oven acts on the principle of :
- a)transferring electrons from lower to higher energy levels in water molecule
- b)giving rotational energy to water molecules
- c)giving vibrational energy to water molecules
- d)giving translational energy to water molecules
Correct answer is option 'B'. Can you explain this answer?
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Microwave oven acts on the principle of :a)transferring electrons from...
Microwave oven acts on the principle of giving rotational energy to water molecules.
Explanation:
A microwave oven is a kitchen appliance that uses microwave radiation to cook or heat food. It operates on the principle of dielectric heating, where the food is heated by the absorption of microwave energy by water molecules present in the food.
Dielectric Heating:
Dielectric heating is a process in which a material is heated by applying an electromagnetic field to it. In the case of a microwave oven, the electromagnetic field is in the form of microwaves. When these microwaves interact with water molecules, they transfer energy to the molecules, causing them to vibrate and rotate.
Rotational Energy:
In the microwave oven, the microwaves have a specific frequency (usually around 2.45 GHz) that matches the energy required for the rotational motion of water molecules. When the microwaves pass through the food, they cause the water molecules to rotate rapidly. This rotational motion leads to an increase in the temperature of the food.
Other Modes of Energy Transfer:
While rotational energy is the primary mode of energy transfer in a microwave oven, other modes such as vibrational and translational energy also contribute to the heating process. Vibrational energy refers to the oscillation of water molecules, and translational energy refers to their movement in space.
However, the rotational energy is the dominant mode of energy transfer because the frequency of the microwaves matches the rotational energy levels of water molecules. This resonance effect leads to efficient heating of the food.
Conclusion:
In conclusion, a microwave oven acts on the principle of giving rotational energy to water molecules. The microwaves in the oven cause the water molecules to rotate rapidly, resulting in the heating of the food. While other modes of energy transfer also occur, rotational energy is the primary mode responsible for the heating process.
Explanation:
A microwave oven is a kitchen appliance that uses microwave radiation to cook or heat food. It operates on the principle of dielectric heating, where the food is heated by the absorption of microwave energy by water molecules present in the food.
Dielectric Heating:
Dielectric heating is a process in which a material is heated by applying an electromagnetic field to it. In the case of a microwave oven, the electromagnetic field is in the form of microwaves. When these microwaves interact with water molecules, they transfer energy to the molecules, causing them to vibrate and rotate.
Rotational Energy:
In the microwave oven, the microwaves have a specific frequency (usually around 2.45 GHz) that matches the energy required for the rotational motion of water molecules. When the microwaves pass through the food, they cause the water molecules to rotate rapidly. This rotational motion leads to an increase in the temperature of the food.
Other Modes of Energy Transfer:
While rotational energy is the primary mode of energy transfer in a microwave oven, other modes such as vibrational and translational energy also contribute to the heating process. Vibrational energy refers to the oscillation of water molecules, and translational energy refers to their movement in space.
However, the rotational energy is the dominant mode of energy transfer because the frequency of the microwaves matches the rotational energy levels of water molecules. This resonance effect leads to efficient heating of the food.
Conclusion:
In conclusion, a microwave oven acts on the principle of giving rotational energy to water molecules. The microwaves in the oven cause the water molecules to rotate rapidly, resulting in the heating of the food. While other modes of energy transfer also occur, rotational energy is the primary mode responsible for the heating process.
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Microwave oven acts on the principle of :a)transferring electrons from lower to higher energy levels in water moleculeb)giving rotational energy to water moleculesc)giving vibrational energy to water moleculesd)giving translational energy to water moleculesCorrect answer is option 'B'. Can you explain this answer?
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