1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sloan [31]
3 years ago
15

You buy a light bulb in the U.S. labeled 75 watts. Since you bought it in the U.S., the power rating assumes that the potential

difference across the light bulb will be 120 volts. Instead, you provide it with a potential difference of 220 volts (the potential difference provided by wall outlets in most European countries). Will the light bulb dissipate 75 watts of power?
Physics
2 answers:
MrRissso [65]3 years ago
5 0

Answer:

    P₂ = 252 W

Explanation:

The electrical power is

          P = V I

The potential difference is

         V = I R

         I = V / R

Let's replace

        P = V² / R

Let's use the given values ​​to calculate the resistance of the bulb

         R = V² / P

         R = 120²/75

         R = 192 ohm

This resistance value does not depend on the applied voltage, so it is constant

       

Let's calculate the power in Europe

        P₂ = V₂² / R

       P₂ = 220²/192

       P₂ = 252 W

the bulb dissipates much more power

Lera25 [3.4K]3 years ago
5 0

Answer:

The light bulb will not dissipate 75 Watts of power when provided with 220 volts

Explanation:

The resistance of the bulb does not change

Let P = Power

V = Voltage

R = Resistance

P = V²/R

When Power = 75 Watts and Voltage = 120 volts

75 = (120)²/R

R = (120)²/75

R = 192 ohms

Since the resistance of the bulb is constant

When V = 220 volts

P = V²/R

P = 220²/192

P = 252.08 W

You might be interested in
3. What is Newton's 1st Law?
pishuonlain [190]

Answer:

A

Explanation:

for every action there is an equal and opposite reaction

3 0
3 years ago
Explain why a crack in glass looks brighter than the rest of the glass
m_a_m_a [10]

Answer:

Because nothing is blocking the LIGHT!

Explanation:

Light may still be shining on the whole glass but if it wasn't there light would shine brighter than if it was there.

8 0
3 years ago
In a series circuit with three light bulbs...
Tomtit [17]

Answer:

are you still looking for an answer?

Explanation:

because if you are i could give it to you. K?

5 0
4 years ago
Explain how you know the car is accelerating when it reaches a curve on the road
horrorfan [7]
Acceleration is a Vector, so speed and direction. If you change your direction you are also changing your acceleration because it's a vector.
6 0
4 years ago
Read 2 more answers
Pluto has been reassigned and is now a dwarf planet. Why did scientists think this reassignment was necessary? If you were a sci
never [62]
Pluto was discovered by the astronomer Clyde Tombaugh in February 1930. It was given the status of the ninth planet of the solar system.
As telescopes, particularly in on satellites, improved, more objects were discovered which caused a problem that they were quite small and some astronomers didn't think they qualified as being planets.
The International Astronomical Union (IAU) had a vote which was very close. They defined three criteria which a planet must satisfy.
It must be large enough for gravity to overcome structures of materials and make it spherical. Most bodies are flattened spheroids due to rotation.
It must orbit the Sun.
It must have cleared its orbit of other bodies other than moons.
The IAU created a new definition of an object called a dwarf planet which only satisfies the first two criteria. Pluto fails the third criterion, so it was demoted to a dwarf planet.
Many people, including myself, still consider Pluto to be the ninth planet.
To be pedantic, Jupiter has a lot of asteroids in its orbit at its two Lagrange points. They are called trojan asteroids. So, this means that Jupiter fails the IAU's third criterion and should be a dwarf planet, which it is certainly not!
7 0
3 years ago
Read 2 more answers
Other questions:
  • What is iencl, the current passing through the chosen loop?
    10·1 answer
  • To avoid compromising your car's aerodynamic properties, you should avoid ________.A. running your air conditioning system B. ta
    13·1 answer
  • Copper has a specific heat of 0.386 J/g°C. How much heat is required to increase 5.00 g of copper from 0.0°C to 10.0°C?
    10·1 answer
  • How much amount of heat is required to raise the temperature of 20 grams of water from 10°C to 30°C? The specific heat of water
    13·2 answers
  • A container filled with gas has a volume of 185 mL and a pressure of 310 mm Hg. The desired new volume is 74.0 mL. What is the r
    6·1 answer
  • Many doorbells work in the way pictured below. An electromagnet, which is made up of a coil of wire wrapped around a metal core,
    15·2 answers
  • Which products do you think required scientific knowledge to develop? Check all that apply.
    8·2 answers
  • Is the threat of or actual use of physical force against oneself or another person.
    12·2 answers
  • Please Help AND NO LINKS OR U WILL BE REPORTED!!
    5·1 answer
  • How do organisms use the raw materials they ingest from the environment?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!