Question

Voltage needed to raise current to 3.75a using 20,20,200 resistor set

Answer 1

There are six different ways to arrange those resistors.

Each way leads to a different answer.

You didn't tell us how you want them connected.

The attached drawing shows them all.

Answer 2

Answer: The voltage needed is 35.7 V

Step-by-step explanation:

Assuming that the resistors are arranged in parallel combination.

For the resistors arranged in parallel combination:

`(1)/(R)=(1)/(R_1)+(1)/(R_2)+(1)/(R_3)`

We are given:

`R_1=20\Omega\\R_2=20\Omega\\R_3=200\Omega`

Using above equation, we get:

`(1)/(R)=(1)/(20)+(1)/(20)+(1)/(200)\\\\(1)/(R)=(10+10+1)/(200)\\\\R=(200)/(21)=9.52\Omega`

Calculating the voltage by using Ohm's law:

`V=IR` .....(1)

where,

V = voltage applied

I = Current = 3.75 A

R = Resistance =
`9.52\Omega`

Putting values in equation 1, we get:

`V=3.75* 9.52\\\\V=35.7V`

Hence, the voltage needed is 35.7 V