Need some help with math problem's

Need some help with math problem's

PostBy: theo On: Sun Feb 22, 2009 3:39 pm

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

PostBy: Nevercold On: Sun Feb 22, 2009 4:12 pm


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

PostBy: Flyer5 On: Sun Feb 22, 2009 6:17 pm

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

PostBy: WNY On: Sun Feb 22, 2009 6:44 pm

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
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Re: Need some help with math problem's

PostBy: 009to090 On: Sun Feb 22, 2009 8:20 pm

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. :D

Chris F.
009to090
 
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Re: Need some help with math problem's

PostBy: Dann757 On: Mon Feb 23, 2009 9:11 pm

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

That's my extent of electro knowledge
Dann757