# Need some help with math problem's

### Need some help with math problem's

Hello All, I need some help with some math problem's. 1. A relay has a coil resistance of 100 oham and it's coil is rated at 0.2 A. What is the voltage rating of this relay? 2. A relay has a coil resistance of 12 oham and it's coil is rated at 3.6 volt How much current must be supplied to operate the relay? 3. A relay coil is rated at 12 volt and 0.12 amp What is the resitance of the relay coil?
theo

Stove/Furnace Make: LL
Stove/Furnace Model: Hyfire 2

### Re: Need some help with math problem's

http://www.geocities.com/MotorCity/Speedway/7795/elec.html
This link is broken, either the page no longer exists or there is some other issue like a typo.
Nevercold

Stove/Furnace Make: Harman
Stove/Furnace Model: DVC-500

### Re: Need some help with math problem's

theo wrote:Hello All, I need some help with some math problem's. 1. A relay has a coil resistance of 100 oham and it's coil is rated at 0.2 A. What is the voltage rating of this relay? 2. A relay has a coil resistance of 12 oham and it's coil is rated at 3.6 volt How much current must be supplied to operate the relay? 3. A relay coil is rated at 12 volt and 0.12 amp What is the resitance of the relay coil?

1: is 20 volts 2: .3A 3: 100 ohm
Flyer5

Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

### Re: Need some help with math problem's

Voltage = Current * Resistance

voltage = 100 * .2

Voltage = 20 volts

use the equation to figure the rest.

Voltage / Resistance = Current (Amps.)
WNY

Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

### Re: Need some help with math problem's

WNY wrote:Voltage = Current * Resistance

voltage = 100 * .2

Voltage = 20 volts

use the equation to figure the rest.

Voltage / Resistance = Current (Amps.)

Ditto to the replies above. Also:
Give a man a fish, feed him for a day.
Teach a man to fish, feed him for a lifetime.

Chris F.
009to090

Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

### Re: Need some help with math problem's

R= E/I
I=E/R
E=IxR

That's my extent of electro knowledge
Dann757