Chapter 26, Problem 69MSPP

Halogen Bulbs

Halogen bulbs have some differences from standard incandescent lightbulbs. They are generally smaller, the filament runs at a higher temperature, and they have a quartz (rather than glass) envelope. They may also operate at lower voltage. Consider a 12 V, 50 W halogen bulb for use in a desk lamp. The lamp plugs into a 120 V, 60 Hz outlet, and it has a transformer in its base.

What will be the voltage across the bulb if the lamp’s power cord is accidentally plugged into a 240 V, 60 Hz outlet?

A. 2 V

B. 24 V

C. 36 V

D. 48 V