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A 60 w lamp given a luminous flux of 1500 lumen. Its efficiency is
- a)1500 lumen/watt
- b)250 lumen/watt
- c)25 lumen/watt
- d)2.5 lumen/watt
Correct answer is option 'C'. Can you explain this answer?
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A 60 w lamp given a luminous flux of 1500 lumen. Its efficiency isa)15...
Given:
Power of the lamp = 60 W
Luminous flux = 1500 lm
Efficiency of the lamp is given by the ratio of luminous flux to the power consumed.
Efficiency = Luminous flux / Power
Substituting the given values, we get:
Efficiency = 1500 lm / 60 W
Simplifying the above expression, we get:
Efficiency = 25 lm/W
Therefore, the correct option is C) 25 lumen/watt.
Explanation:
Luminous flux is a measure of the total amount of light emitted by a source, while power is the rate at which energy is consumed by the source. The efficiency of a lamp is a measure of how effectively it converts electrical energy into light energy. In other words, it is a measure of how much light is produced per unit of electrical power consumed.
The efficiency of a lamp is given by the ratio of luminous flux to power. The unit of luminous flux is lumen and the unit of power is watt. Therefore, the unit of efficiency is lumen/watt. This unit represents the amount of light produced per unit of power consumed by the lamp.
In this question, we are given the power of the lamp and the luminous flux produced by it. Using the formula for efficiency, we can calculate the efficiency of the lamp. The answer is given in lumen/watt, which represents the amount of light produced per unit of power consumed by the lamp.
Power of the lamp = 60 W
Luminous flux = 1500 lm
Efficiency of the lamp is given by the ratio of luminous flux to the power consumed.
Efficiency = Luminous flux / Power
Substituting the given values, we get:
Efficiency = 1500 lm / 60 W
Simplifying the above expression, we get:
Efficiency = 25 lm/W
Therefore, the correct option is C) 25 lumen/watt.
Explanation:
Luminous flux is a measure of the total amount of light emitted by a source, while power is the rate at which energy is consumed by the source. The efficiency of a lamp is a measure of how effectively it converts electrical energy into light energy. In other words, it is a measure of how much light is produced per unit of electrical power consumed.
The efficiency of a lamp is given by the ratio of luminous flux to power. The unit of luminous flux is lumen and the unit of power is watt. Therefore, the unit of efficiency is lumen/watt. This unit represents the amount of light produced per unit of power consumed by the lamp.
In this question, we are given the power of the lamp and the luminous flux produced by it. Using the formula for efficiency, we can calculate the efficiency of the lamp. The answer is given in lumen/watt, which represents the amount of light produced per unit of power consumed by the lamp.
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Community Answer
A 60 w lamp given a luminous flux of 1500 lumen. Its efficiency isa)15...
1500/60= 25
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A 60 w lamp given a luminous flux of 1500 lumen. Its efficiency isa)1500 lumen/wattb)250 lumen/wattc)25 lumen/wattd)2.5 lumen/wattCorrect answer is option 'C'. Can you explain this answer?
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