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
WARRIOR [948]
3 years ago
7

Which device uses AC current to operate?

Physics
2 answers:
sweet [91]3 years ago
6 0

Answer

Correct option is B that is Desktop computer

Explanation

Option A

This option is not correct because in a Locomotive train steam, diesel or batteries are used.

Option B

It is Correct option because in desktop a transformer is there which uses AC current. Most of us have desktop and we used AC current to operate it we don't have any other option to operate a desktop except AC current

Option C

This is not correct option because in  a car we used petrol, deisel, gas or  DC batteries.

Option D

Option D is not correct option because to operate portable media player we can use both  alternating current or batteries

Option

This is not correct option because in  flashlight we uses DC batteries

Hope this answer will help you


xz_007 [3.2K]3 years ago
5 0
B. Desktop computer

A Locomotive train runs on steam, diesel, or batteries

a car either gas or electric uses DC batteries

portable media player can use AC or batteries

A flashlight uses DC batteries

The computer actually has a transformer built into it which uses AC current
You might be interested in
What is the sequence of energy transformations from the moment the ball is dropped to the moment the board is bent to its maximu
Mila [183]

Answer:

B

Explanation:

Transformation of energy involves conversion of energy from one form to another for example our movement around involves the conversion of chemical energy stored in the food we eat to other forms of energy such as kinetic energy for the movement, electrical energy in the neurons for impulses and others

The ball posses gravitational potential energy since it is held at a displacement to the ground ( zero point) and when released, the gravitational potential energy is converted to kinetic energy which leads to the fall of the ball until it is at zero displacement to the earth. The board likewise when bent to its maximum extent stored elastic potential energy as a result of the partial displacement of its constituent particle provided it is  not stretch beyond its elastic limit which can lead to deformation of the board and the elastic potential energy lost.

5 0
4 years ago
Find the net gravitational force fnet acting on the earth in the sun-earth-moon system during the new moon (when the moon is loc
Lina20 [59]
After thorough researching, the net gravitational force Fnet acting on the earth in the sun-earth-moon system during the new moon and when the moon is located directly between the earth and the sun is 3.50x10^22 N. The correct answer to the following given statement above is 3.50x10^22 N.
8 0
4 years ago
Read 2 more answers
An Indy 500 race car's velocity increases from 4.0 m/s to +36
Soloha48 [4]

Answer:

The average acceleration is 8\ m/s^2

Explanation:

<u>Uniform Acceleration </u>

When an object varies its velocity at the same rate, the acceleration is constant.

The relation between the initial and final speeds is:

v_f=v_o+a.t

Where:

vf  = Final speed

vo = Initial speed

a   = Constant acceleration

t   = Elapsed time

The acceleration can be calculated by solving for a:

\displaystyle a=\frac{v_f-v_o}{t}

The Indy 500 race car increases its speed from vo=4 m/s to vf=36 m/s in t=4 s. Thus, the average acceleration is:

\displaystyle a=\frac{36-4}{4}=8\ m/s^2

The average acceleration is 8\ m/s^2

3 0
3 years ago
You take a lab battery and, when it isn't connected to a circuit, you measure a voltage of 4.00-V with a voltmeter. You then con
max2010maxim [7]

Answer:

r = 28.6 ohm

Explanation:

As we know that when battery is in open circuit then the potential difference of the cell is known as EMF

so EMF is given as

EMF = 4.00 V

now when the battery is connected across a resistance of 200 ohm then there is current flowing through the battery

it is given as

i = \frac{V}{R + r}

17.5 \times 10^{-3} = \frac{4}{200 + r}

200 + r = 228.6

r = 28.6 ohm

6 0
4 years ago
What would happen if a proton were added to the nucleus of the atom? (Check all that apply)
katen-ka-za [31]

Answer:

It would become a different element.

Explanation:

When you change the number of protons i.e, add a proton in the nucleus of an atom, you will change the atom from one element to a different element and also positive charge of the atom also increased by 1.

For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium.

So, we conclude that by adding a proton the atom will change from one element to another element.

3 0
3 years ago
Other questions:
  • A large box of mass m sits on a horizontal floor. You attach a lightweight rope to this box, hold the rope at an angle θ above t
    6·1 answer
  • Give three factors which are responsible for the vanishing forest ​
    13·1 answer
  • You need to figure out how high it is from the 3rd floor of Keck science building to the ground. You know that the distance from
    10·1 answer
  • As you increase voltage, what happens to the strength of an electromagnet?
    15·2 answers
  • Why are large astronomical bodies such as planets and stars round???
    11·1 answer
  • A container of water, diameter 12 cm, has a small opening near the bottom that can be unplugged so that the water can run out. I
    14·1 answer
  • The north and South Poles of a magnetic field produced by an electromagnet will switch when the direction of ________ changes.
    11·1 answer
  • A space vehicle is traveling at 3760 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward. The
    15·2 answers
  • Pennies today are copper-covered zinc, but older pennies are 3.1 g of solid copper. What are the total positive charge and total
    13·1 answer
  • In the paralleling technique, the central ray of the x-ray beam must be _____ to the film sensor and the long axis of the tooth.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!