What is the resistance of the bulb filament

[isay1224]

Homework Statement

A microscope illuminator uses a transformer to step down the 120 V AC of the wall outlet to power a 12.0 V ,50 W
microscope bulb
What is the resistance of the bulb filament
what is the rms current of the bulb filament
what is the rms current in the primary coil

Relevant Equations

i dont know really help

i don't know where to start

 

[jbriggs444]

Homework Statement: A microscope illuminator uses a transformer to step down the 120 V AC of the wall outlet to power a 12.0 V ,50 W
microscope bulb
What is the resistance of the bulb filament
what is the rms current of the bulb filament
what is the rms current in the primary coil
Homework Equations: i don't know really help

i don't know where to start

You will need to show some effort. Assume that the bulb is dissipating power at its 50 W rating.

 

[DEvens]

When in trouble, or in doubt, run to Wikipedia, search it out.

https://en.wikipedia.org/wiki/Ohm's_lawhttps://en.wikipedia.org/wiki/Audio_power#Power_calculationshttps://en.wikipedia.org/wiki/Root_mean_square#Average_power

 

[berkeman]

@isay1224 -- Per the PF rules, you need to show your best efforts on your schoolwork problem before we can offer tutorial help. This thread is locked.

Please re-post and use the hints you have been provided above to start working this problem. Start by identifying the equations that relate voltage, current and power.

Also, please use a more descriptive thread title when you start the new thread. The title should describe the problem being asked about in the thread. Thank you very much.