3 years ago

What do we need to generate electricity?

Physics

1 answer:

Alekssandra [29.7K]3 years ago

4 0

Answer:

Electricity is most often generated at a power plant by electromagnetic generators.

You might be interested in

A 120 V potential difference is applied to a space heater that dissipates 674 W during operation. (a) What is its resistance dur

Annette [7]

Answer:

(a) 21.36 ohms

(b) 5.62 A

Explanation:

Parameters given:

Potential difference, V = 120 V

Power, P = 674 W

(a) Power is given as:

P = V²/R

Where R is resistance

=> R = V²/P

R = 120²/674

R = 14400/674

R = 21.36 ohms

(b) Power is also given as:

P = I*V

Where I = Current (time rate of flow of Electric charge)

=> I = P/V

I = 674/120

I = 5.62 A

6 0

3 years ago

Read 2 more answers

Suppose an electrical wire is replaced with one having every linear dimension doubled (i.e. the length and radius have twice the

saul85 [17]

Answer:

The wire now has less (the half resistance) than before.

Explanation:

The resistance in a wire is calculated as:

$R=\alpha \frac{l}{s}$

Were:

R is resistance

$\alpha$ is the resistance coefficient

l is the length of the material

s is the area of the transversal wire, in the case of wire will be circular area ( $s=\pi r^{2}$ ).

So if the lenght and radius are doubled, the equation goes as follows:

$R=\alpha \frac{l}{\pi r^{2} } =\alpha \frac{2l}{\pi {(2r)}^{2} } =\alpha \frac{2l}{\pi 4 {r}^{2} }=\frac{1}{2} \alpha \frac{l}{\pi r^{2} }$

So finally because the circular area is a square function, the resulting equation is half of the one before.

7 0

3 years ago

_____ measures an objects change in position per unit time.

Anettt [7]

Speed (ex: meters/second, miles/hour)

5 0

3 years ago

Read 2 more answers

How is the crust DIFFERENT from the other layers of the Earth?

svlad2 [7]

B) the crust is much thinner from the other layers

8 0

3 years ago

Read 2 more answers

A linebacker runs at 3 m/s and collides with a running back running towards him at 3.2

Anit [1.1K]

Answer:b

Explanation:

im in fifth grade so i guessd. gl tho heh.

3 0

3 years ago