Bro it easy just look
2 answers:
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Answer:
Resister of 0.15 W is to be added.
Step-by-step explanation:
In a given circuit we have the attachments
A power supply of 12 V
High intensity LED with forward voltage = 4.5V
LED is rated to withstand a maximum current of 20 mA or
We have to calculate the size of a resister to be connected in series.
Here we will apply the Ohm's law for the calculations
Total voltage of the circuit = voltage of LED + voltage across resistance.
r = (12 - 4.5)/20.10^{-3}
r = 7.5×10^{3}/20 = 375 ohm
Therefore power of the resistance = i².r
= 0.15 W
Therefore a resister of 0.15 W is to be added.
Answer:
6
Step-by-step explanation:
The base of the triangle is 6.
This is because if the 2 given angles are 90, and 45, then that means that last angle must also be 45 because if you add all the angles of a triangle, it adds to 180.
To solve for x, also known as c, we do .
If, 36 + 36 = 72, Then x is the square root of 72, also known as D: 6
(as shown in the picture below)
Hope that helps!
