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3 years ago

A major difference between AC and DC electricity is that

Physics

2 answers:

Charra [1.4K]3 years ago

5 0

Answer:

A) the current in AC electricity varies in magnitude and direction.

Explanation:

Ostrovityanka [42]3 years ago

3 0

Answer:

in AC the current constantly reverses direction, while in DC the direction of the current remains the same

Explanation:

The major difference between the two types of electricity is the following:

- DC (Direct Current): in this type of electricity, the charge carriers (generally, electrons) travel in one direction only - always from the point at lower potential to the point at higher potential. This type of current is the current created by cells or batteries, and it is used by portable devices (e.g. laptops, cameras, etc.)

- AC (Alternating Current): in this type of electricity, the charge carriers constantly change their direction of motion. In fact, in this case, there is a generator which provides an alternating voltage (which means that the polarity of the voltage is constantly reversed). This type of current is the one used by household appliances. Also, the electricity from power plants to the houses is also transferred as AC electricity.

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What does electrons and the nucleus have in common?

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4 years ago

The velocity of a car increases from 2.0 m/s to 16 m/s in a time

Crazy boy [7]

Answer:

4.0 m/s

Explanation:

acceleration = (16-2) /3.5 = 4 m/s

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3 years ago

The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub your toe in the dark, estimate the tim

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3 years ago

A ray of light has a wavelength of

MArishka [77]

Answer:

The wavelength in vacuum is equal to 428.8 nm.

Explanation:

Given that,

The wavelength of light, $\lambda=284\ nm$

The refractive index of glass, n = 1.51

We need to find the wavelength in vacuum. The relation between wavelength and refractive index is given by :

$n=\dfrac{\lambda_v}{\lambda}\\\\\lambda_v=n\times \lambda\\\\\lambda_v=1.51\times 284\\\\\lambda_v=428.8\ nm$

So, the wavelength in vacuum is equal to 428.8 nm.

6 0

3 years ago

a current exists whenever electric charges move. if δq is the net charge that passes through a surface during a time period δt,

mr Goodwill [35]

The average current during the given time interval is δq/δt.

Based on their motion, charges are of two types- charges at rest and charges in motion.

The charges at rest do not produce an electric current but the moving charges produce an electric current.

The attached diagram represents the flow of charges which leads to the production of electric current.

The flow of current is not always steady, so we define it in the form of average current for a particular duration of time.

The relation between average current, the amount of charge passing through a surface, and the time taken in doing so is given by the following equation,

I = δq/δt

Here, I represent the average current during a particular duration of time, δq is the amount of net charge that passes through a surface during a period δt.

Hence, the average current during this time interval is δq/δt.

To know more about "Electric current", refer to the following link:

brainly.com/question/2264542?referrer=searchResults

#SPJ4

5 0

2 years ago