Physics, 30.10.2019 03:31 XOsam

Acircuit consists of a series combination of 6.50 −kω and 5.00 −kω resistors connected across a 50.0-v battery having negligible internal resistance. you want to measure the true potential difference (that is, the potential difference without the meter present) across the 5.00 −kω resistor using a voltmeter having an internal resistance of 10.0 kω.(a) what potentialdifference does the voltmeter measure across the 5.00-kω resistor? (b) what is the true potential difference across thisresistor when the meter is not present? (c) by what percentage isthe voltmeter reading in error from the true potentialdifference?

Answers: 1

Show answers

Answers

Answer from: flixtier

Part a)

V = 16.95 Volts

Part b)

V = 21.74 V

Part c)

error = 22 %

Explanation:

Part a)

When voltmeter of 10 k ohm is used to measure the voltage across the given resistor then we will have

$R_{eq} = \frac{R_1 R_2}{R_1 + R_2}$

$R_{eq} = \frac{5 \times 10}{5 + 10}$

$R_{eq} = \frac{50}{15} = \frac{10}{3} k$ ohm

now the current through the given cell is

$i = \frac{V}{r_1 + r_2}$

$i = \frac{50}{6.50 + \frac{10}{3}}\times 10^{-3}$

i = 5.08 mA

now voltage across 5 k ohm resistor is given as

V = i R

$V = (5.08 mA)(\frac{10}{3}\times 10^3)$

V = 16.95 Volts

Part b)

If there is not voltmeter connected across 5 k ohm

then current in the circuit is given as

$i = \frac{50}{6.5 + 5} \times 10^{-3} A$

i = 4.35 mA

Now voltage across 5 k ohm resistor

V = iR

$V = 4.35 \times 10^{-3} (5 \times 10^3)$

V = 21.74 V

Part c)

percentage error in the reading is given as

$error = \frac{V_1 - V_2}{V_1} \times 100$

$error = \frac{21.74 - 16.95}{21.74} \times 100$

error = 22 %

Answer from: Quest

so here is the information for current research:

-nrel's geothermal analysts, scientists, and engineers perform a full range of research from developing advanced methods of locating and accessing geothermal resources to exploring innovative technologies to extract and produce clean energy from the heat of the earth

and here is the information for the technology of geothermal energy:

-it's clean and sustainable

-resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma

-almost everywhere, the shallow ground or upper 10 feet of the earth's surface maintains a nearly constant temperature between 50° and 60°f (10° and 16°c)

-geothermal heat pumps can tap into this resource to heat and cool buildings

-a geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building

-in the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system

-in the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger

-the heat removed from the indoor air during the summer can also be used to provide a free source of hot water

Answer from: Quest

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

Another question on Physics

Physics, 22.06.2019 00:10

I'm kinda lost ! 1. when marilyn takes her pet dog for a walk, the dog walks at a veryconsistent pace of 0.55 m/s. draw a position-time graph to representmarilyn's dog walking the 19.8 m distance from the front of her house tothe nearest fire hydrant.2. both car a and car bleave school when a stopwatch reads zero. car atravels at a constant 75 km/h, and car b travels at a constant 85 km/h.a) draw a position-time graph showing the motion of both cars. howfar are the two cars from school when the stopwatch reads 2 hrs? calculate the distances and show them on your graph.b) both cars passed a gas station 120 km from the school. when dideach car pass the gas station? calculate the times and show themon your graph.3. the figure below shows the position-time graph showing a shopper'smovement up and down the aisle at a store.a) write a story describing the shopper's movements at the store.b) when does the shopper have a position of 6 m? c) how much time passes between when the shopper enters the aisleand when he gets to a position of 12 m? what is the shopper's averagevelocity between 37 s and 46 s?

Answers: 3

Answer

Physics, 22.06.2019 18:30

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

Answers: 1

Answer

Physics, 22.06.2019 20:30

Acold front traveling southeast collided with a warm front traveling northwest the following map shows the weather on monday the day the two fronts collided which of these describes the weather forecast for mississippi on tuesday and wednesday

Answers: 2

Answer

Physics, 22.06.2019 21:00

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

Answers: 1

Answer

You know the right answer?

Acircuit consists of a series combination of 6.50 −kω and 5.00 −kω resistors connected across a 50.0...

Questions