How do I calculate how many light bulbs that a 9V DC, 200mA relay coil, contacts 120V, 10A can safely control?

 

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You've posted in Homework Help. If this is homework, show your calculations. When you do that, you'll find that you haven't provided sufficient information to answer the question.

 

Welcome to AAC!

You've posted in Homework Help. If this is homework, show your calculations. When you do that, you'll find that you haven't provided sufficient information to answer the question.

I've been asked to determine the max number of 100W, 120V light bulbs that a relay coil rated as 9V DC, 200mA, contacts 120V AC, 10A, can safely be controlled by the relay

 

How much current would one bulb draw?

 

I've been asked to determine the max number of 100W, 120V light bulbs that a relay coil rated as 9V DC, 200mA, contacts 120V AC, 10A, can safely be controlled by the relay

Don't come here expecting answers ! ... Only more questions . Here's another ....

How much of the information (numbers) I've highlighted do you need to answer the question ? Give your reason.

(a) ... All of it

(b) ... Two thirds of it

(c) ... Half

 

As dl324 says, how many amps does one bulb pull?

Clue - use Power Triangle equation to work out.