Question

A 60 watt, 120 volt bulb is designed to reduce the voltage of a$\frac{1}{2}$ amp current by 120 volt. If you screw this bulb into a fixture that is powered by very long thin wires, it will glow more dimly than intended because voltage drop across the bulb will be -

• A. Less than 120 V & the current through the bulb will be less than $\frac{1}{2}Amp.$
• B. 120 V, but the current through the bulb will be less than $\frac{1}{2}$Amp.
• C. 120 V and the current through the bulb will be$\frac{1}{2}$Amp.
• D. Less than 120 V, but current will still $\frac{1}{2}$Amp.

Answer 1

Answer: (A)

Less than 120 V & the current through the bulb will be less than $\frac{1}{2}Amp.$

Answer 2

As current pass through thin & long wire, current

looses voltage. \ voltage drop available to bulb < 120V

also current will be less than $\frac{1}{2}$Amp.