1.

Determine the resistance of a certain resistor that dissipates 0.2 W when the current is 50 mA.Select one:a. 80 ohmsb. 0.5 k-ohmsc. 72  ohmsd. 4 ohmsno spam ​

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80 ohms is the required answer

Explanation:

According to the Question

It is GIVEN that ,

Power ,P = 0.2 W

current ,I = 50mA

We need to CALCULATE the resistance of the resistor .

Firstly we change the unit here .

Current

1MA = 1/1000

50mA = 50/1000 = 0.05 A

Now,

calculating the resistance of the resistor.

Relationship between Resistance , Power & Current .

P = I²R

where,

P denote Power

I denote Current

R denote Resistance

Substitute the value we get

➺ 0.2 = 0.05² × R

➺ 0.2 = 0.0025 × R

➺ R = 0.2/0.0025

➺ R = 80 ohm

So, the required OPTION is (a) 80 ohm.

Step-by-step explanation:

hopes it's helps u :)



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