Question

What is the resistance of a relay coil at 28 V, 0.1 A?

Answer 1

280 ohms

Step-by-step explanation:

I = V/R

Then you make R the subject of the formula

R = V/I

R = 28/0.1

R= 280 ohms

Answer 2

Answer: Remember the formula V = IR ?

That’s all you need.

You know the current through the resistor, and you can easily work out the voltage drop required across the resistor, so it’s a bit of simple arithmetic to work out the value of R required.

Now do your own homework

Step-by-step explanation: