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sammy [17]
3 years ago
13

The illuminance On a surface is six lux and the surface is 4 meters from the light source what is the intensity of the source

Physics
1 answer:
Liula [17]3 years ago
5 0

Answer : 96 candelas

Explanation : Luminous intensity is a quantity of light that is emitted by a light source with a solid angle in a particular direction.

We know the formula of luminous intensity

Luminous intensity = illuminance x distance from light source

L_{v} = E_{v}\times d^{2}

L_{v} = 6\times 16\ candelas

L_{v} = 96\ candelas

So, the intensity of the source will be 96 candelas.


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A cylindrical metal can is to have no lid. It is to have a volume of 125π in3. What height minimizes the amount of metal used?
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A charge of 12 c passes through an electroplating apparatus in 2. 0 min. what is the average current?
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A charge of 12 c passes through an electroplating apparatus in 2.0 min, then the average current is 0.1 ampere.

<h3>What is an electric charge?</h3>

Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive or negative electric charge.

Electric current is defined as the charge per unit of time.

The mathematical relation between current and the electric charge

I =Q/T

where I is the current flowing

Q is the total electric charge

T is the time period for which the current is flowing

As given in the problem A charge of 12 c passes through an electroplating apparatus in 2.0 min

Let us first convert the time period of minutes into seconds

1 min = 60 seconds

2 min = 2*60 seconds

         =120 seconds

By using the above relation between electric current and electric charge

and by substituting the respective values of the charge and the time period

I =Q/T

I = 12c/120 seconds

I = 0.1 Ampere

Thus, the average current flowing through the apparatus would be 0.1 Ampere.

Learn more about an electric charge from here

brainly.com/question/8163163

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Please help <br>Newton second law of motion is F =ma <br>​
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2 years ago
Read 2 more answers
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