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3 years ago

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

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How much time does it take a trucker to deliver his shipment 480 km away travelling at an average speed of 120 km/hr?

kifflom [539]

Answer: time=4 hours

Explanation:

formula:

speed = $\frac{distance}{time}$

time = $\frac{distance}{speed}$

time= x

speed = 120km/hr

distance = 480 km

x = $\frac{480 km}{120km/hr\\}$

= $\frac{48km*hr}{12km}$

cut the zeros

and remove the signs

then

$\frac{48}{12}$ = 4

therefore, time taken to deliver the shipment by trucker is 4 hours

8 0

3 years ago

A car traveling with constant speed travels 150 km in 7200 s what is speed of the car

spayn [35]

The speed of the car is exactly 150/7200 km/sec, or 125/6 meters/sec.

In more familiar units, that speed is equivalent to ...

-- (20 and 5/6) meters/sec

-- 75 km/hour

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3 years ago

An atom with seven valence electrons would most likely lose an electron to become stable true or fasle

mel-nik [20]

Answer:

false

Explanation:

since it has seven valence electrons it means it's a non metal and non metals always gain electrons.

5 0

2 years ago

A man goes for a walk, starting from the origin of an xyz coordinate system, with the xy plane horizontal and the x axis eastwar

tekilochka [14]

<h2>a) Displacement of penny = 1300 i + 2400 j - 640 k</h2><h2>b) Magnitude of his displacement = 2729.47 m</h2>

Explanation:

a) He walks 1300 m east, 2400 m north, and then drops the penny from a cliff 640 m high.

1300 m east = 1300 i

2400 m north = 2400 j

Drops the penny from a cliff 640 m high = -640 k

Displacement of penny = 1300 i + 2400 j - 640 k

b) Displacement of man for return trip = -1300 i - 2400 j

$\texttt{Magnitude = }\sqrt{(-1300)^2+(-2400)^2}=2729.47m$

Magnitude of his displacement = 2729.47 m

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3 years ago

Read 2 more answers

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Marta_Voda [28]

Explanation:

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Hope I helped !

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3 years ago