An energy source forces a constant current of 2A to flow through a light bulbfilament for twenty seconds. If 4.6 kJ is given off in the form of light and heatenergy, calculate the voltage drop across the bulb.

The voltage drop across the bulb is 115 V

Explanation:

The voltage drop equation is given by:

Where:

ΔW is the total work done (4.6kJ)

Δq is the total charge

We need to use the definition of electric current to find Δq

Where:

I is the current (2 A)

Δt is the time (20 s)

Then, we can put this value of charge in the voltage equation.

Therefore, the voltage drop across the bulb is 115 V.

I hope it helps you!

the correct choice is a .

do not post any more test or exam questions on

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.