PHY 102 Exam 4 Question and Answers complete solution 2022

Charge flows into a - closed circuit P = - IV V = - IR On some early automobiles both headlights went out when one bulb burned out. The headlights must have been connected in - a series circuit Current is measured in - ampere (amps) The power dissipated in each of two light bulbs is the same. The potential across light bulb A is twice that of light bulb B. If the resistance of light bulb B is R, what is the resistance of light bulb A? - 4R The same potential difference is measured across two wires. Wire A carries twice the current of wire B. If the resistance of wire B is R, what is the resistance of wire A? - R/2 A light bulb carries a current I. The power dissipated in the light bulb is P. What is the power dissipated if the same light bulb carries a current of 3I? - 9P Two poles of a magnet: - south and north A south pole attracts - a north pole