The electric power P drawn from a generator by a lightbulb of resistance R is P = V2/R, where V is the line voltage. The resistance of bulb B is 87% greater than the resistance of bulb A. What is the ratio PB/PA of the power drawn by bulb B to the power drawn by bulb A if the line voltages are the same?

The electric power P drawn from a generator by a lightbulb of resistance R is P = V2/R, where V is the line voltage. The resistance of bulb B is 87% greater than the resistance of bulb A. What is the ratio PB/PA of the power drawn by bulb B to the power drawn by bulb A if the line voltages are the same?

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter1: Measurement

Section: Chapter Questions

Problem 2E

See similar textbooks

Similar questions

The voltage V in volts of an electrical circuit is V = IR, where R is the resistance in ohms and I is the current in amperes. R is increasing at a rate of 2 ohms per second, and V is increasing at a rate of 3 volts per second. At what rate is I changing when V = 12 volts and R = 4 ohms?
How many kw-hr of energy does a 40 Watt light bulb use in one hour? B) FPL charges 10.8 cents per kw-hr of energy usage. How much did you spend running your 40 Watt light bulb for one hour?
A house’s electricity use, over a one day period, is modelled by E(t) = t + sin(t) (kW), where t is in hours. What is cumulative energy consumption of the household over the period, approximately? Include units.
The electrical resistance varies directly as the square of the voltage (V) and inversely as the electric power (P)If the voltage is 12 volts and the electric power is 4 watts, then the electrical resistance is 36 ohms. Express the electrical resistance as a function of voltage and electric power.
The previous reading in my meter is 36893 and the present reading is 36989 after a month. How much will I pay for my consumed electrical energy if the rate is P10.00/kWhr
Suppose you use 57 kWh (kilowatt hours) of electricity at $0.35 per kWH, 91 kWh at $0.26 per kWh, and 82 kWH at $0.24 per kWh. What is your average cost per kHW of electricity? Find the weighted average. Enter your answer rounded to two decimal places.
V volts Q1.8 If the slope of the graph for electric field mapping is 0.5 V/cm and the distance between the positive and negative electrodes was 18 cm, then the e.m.f (in V) of the battery used was: X cm 15 13.5 11.5 9. 10
The SI unit of electrical energy is ____________ a) kilojoule (KJ) b) joules (J) c) watt (W) d) kilowatt (KW)
The trend in average space per worker has dropped from 250 sf to 150 sf in the past few years. In comparative terms, how does that trend affects the OCCUPANCY COST, and the DENSITY of office space? The higher the occupancy cost, the lower the density The higher the occupancy cost, the higher the density The lower the occupancy cost, the lower the density The lower the occupancy cost, the higher the density
How much efficiency would a solar panel of surface area A = 2 m² need to have to generate 1.7 kWh of electricity in a region where the solar power density is 4.5 kWh/m2/day? Write the efficiency in decimal value rounded off to 2 decimal places, not as a percentage. For instance you would write 0.25 and not 25%.
Alyssa is going to use a computer at an internet cafe. The cafe charges an initial fee to use the computer and then an additional price per minute of usage. Let C represent the total cost of using a computer for t minutes at the internet cafe. The table below has select values showing the linear relationship between t and C. Determine the initial charge to use a computer.
If the average household in a region consumes about 5,250 kWh of energy per year. In the region, the average annual solar energy potential is about 1,450 kWh/m² per year. If solar panels are available in sizes of 1 m x 1 m with an efficiency of 18 %, how many panels will be needed to power a house? (Since you can't have a fraction of panel, always round up you number to the next integer.) Your Answer: Answer