An engineer is building a device to open and close a door. He's using a 48V power supply and needs 3A present at the door motor

Question

2 years ago

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An engineer is building a device to open and close a door. He's using a 48V power supply and needs 3A present at the door motor

to open it properly. What combination of resistors should he use?
Question 10 options:

A)

Two 6 ohms and a 10 ohm

B)

Four 8 ohms and two 4 ohms

C)

Four 2 ohms

D)

Three 8 ohms

Physics

1 answer:

noname [10] · Answer 1 · 2023-06-03T06:48:16+03:00

The combination of resistors should he use will be the two resistors one having resistance 10 ohm and another will be 6 ohms. Option A is correct.

<h3 /><h3>What is resistance?</h3>

Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.

The given data in the problem is;

V is the voltage= 48 V

Current,I=3A

R is the resistance

From ohm's law the voltage is found as;

V=IR

R=V/I

R=48 / 3

R = 16 ohm

If two resistors have the resistance 6 ohms and 10 ohm connected in the series the equivalent resistance is;

$\rm R_{eq}=10 \ ohm + 6 \ ohm \\\\ R_{eq}= 16 \ ohm$