The potential difference across wire is 75V and its electric resistance is 30Ω. Find out the electric current through the wire.

Answers

Answer 1

Answer:

Answer:

current = 2.5A

Explanation:

We can use Ohm's law which states that V∝R so V=IR when the temperature is constant where V is the voltage (potential difference), I is the current and R is the resistance.

75= 30I

I= 75/30= 2.5A

Related Questions

Joan makes the device shown in her science class.An illustration with a battery and ends labeled positive and negative. A wire is connected to the positive end of the battery and curls around an iron nail and connects back with the negative side of the battery.What would happen to the magnetic field if she connects the battery in the opposite direction?The field would stop.The field would get stronger.The field would reverse its poles.The field would get weaker.
Four wire AB,BC,CD and DA each resistance 4 ohm and a fifth wire BD of resistance 8 ohm are joined to form a rectangle to which BD is a diagonal.The effective resistance between the points A and B is?
To dry the brakes, drive slowly in __________ and apply light pressure on your brake pedal.
If the tension in a rope is increased what will happen to the speed of a wave traveling through the rope
You are sitting in a car that isn't moving; suddenly, the car quickly accelerates. your body seems to be pushed back against the seat. which word best explains why your body seemed to be pushed backward against the seat?

Which star makes up Orion's knee to your right, or the end of his tunic?A.
Polaris

B.
Sirius

C.
Betelgeuse

D.
Rigel

Answers

Answer:

Betelgeuse and Rigel

Explanation:

100% correct

A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque.a. True
b. False

Answers

Correct answer choice is :

A) True

Explanation:

Lipoproteins are essentially a hub full of fat and cholesterol, along with a lipid layer that includes proteins named apolipoproteins. There are many kinds of lipoproteins, but the two most prominent ones are called Low-Density Lipoprotein and HDL.LDL particles are seldom related to as bad lipoprotein because of concentrations, dose-related, associated with atherosclerosis change. High-density lipoproteins (HDL) get fat molecules from the body's cells and take it back to the liver.

The correct answer for the question that is being presented above is this one: "TRUE." A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque. The statement that is presented is True.

A typical oil control ring consists of _______ separate part(s). A. three
B. four
C. two
D. one

Answers

A. three

Oil spill can be very harmful to marine life because the chemical make up of oils can be poisonous to marine life. The oil can also affect the natural body temperature of marine animals especially to the small fish. Sea otters and sea birds are the most commonly affected by oil spills and those other marine animals that can be found in the shoreline. Heavy oils like the bunker oils used to fuel ships are the most harmful oil because when this oil stick to birds feathers, they may have an inability to warm themselves that could lead them to die.

Answer:

Three

Explanation:

Oil control rings are designed differently than compression rings. A typical oil control ring consists of three separate pieces: two very thin metal rings called scrapers, and a spacer ring called an expander placed in the groove between them.

"Darwin's finches" reside on the Galapagos Islands. Each species has a different type of beak, however, they can all be traced back to one common ancestor. The different beaks are an example of _____.reproductive organs
adaptations
speciation
genes

Answers

It would be adaptation because the finches live in different islands and each have different weather and resources

Answer:

Explanation:

In biology, adaptation has three related meanings. Firstly, it is the dynamic evolutionary process that fits organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process.

Consider these scenarios. A pink box with containing the words Scenario 2 You are about 7 meters away from a metal bar that is struck with a drumstick. The sounds travels through the air to your ear. In which of these scenarios would the sound of the drumstick hitting the metal bar get to you in the least amount of time? Explain your answer.

Answers

Answer:

Scenario 1 will cause the sound of the drumstick hitting the metal bar to reach your ears in the least amount of time.

Explanation:

The sound wave will travel faster in the metal bar than through the air because the speed of sound waves in solids is faster than it is in gases.

Answer:

Scenario 1 will cause the sound of the drumstick hitting the metal bar to reach your ears in the least amount of time.

Explanation:

ifunny is dankreloaded

What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?

Answers

This can be seen as a trick question because heat engines can typically never be 100 percent efficient. This is due to the presence of inefficiencies such as friction and heat loss to the environment. Even the best heat engines can only go up to around 50% efficiency.

Answer:

An infinite temperature

Explanation:

The efficiency of an engine is defined as:

$\eta=1 -(T_C)/(T_H)$

where

$T_H$ is the temperature at which heat enters the engine

$T_C$ is the temperature of the environment, to which the engine exhausts heat

From the formula, we see that for an engine to be 100% efficient, the fraction

$(T_C)/(T_H)$

must be equal to zero. Since the value of $T_C$ is never zero (the temperature is expressed in Kelvin, and the temperature of the environment can never be exactly 0 K), the only possibility for that to occur is that the temperature at which heat enters the engine ( $T_H$ ) is infinite, so that this fraction becomes zero and the efficiency becomes 1.

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Imagine you are holding an apple. how could you increase the potential energy of this apple?

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If you know the components of a vector, what mathematical relationship can be used to find the magnitude of the vector?