Author Question: A light bulb with a tungsten filament is attached to a source of variable voltage. As the voltage is ... (Read 135 times)

Bob-Dole · **on:** Jul 28, 2018

A light bulb with a tungsten filament is attached to a source of variable voltage. As the voltage is increased on the bulb,
a. the bulb's resistance decreases.
b. the bulb's resistance increases.
c. the power dissipated remains constant.
d. the current in the bulb decreases.

Question 2

A syringe has an inside radius of its barrel of 0.50 cm and at the opening at the end of the needle the radius is 1.0 mm. If a force F is applied to the plunger, what is the force produced at the opening of the needle?
a. 5F
c. F/5
b. 25F
d. F/25