Ask question

Ask question

All categories

3 years ago

12

Which of the following statements describes an electric generator?

2 answers:

belka [17]3 years ago

4 0

An electric generator is when a magnet is rotated through a coil of wire to produce an electric current.

Maru [420]3 years ago

3 0

Answer:

A. A magnet is rotated through a coil of wire to produce an electric current.

Explanation:

An electric generator works on the principle of Faraday's law of induction. As the magnetic flux linked with the coil changes, an emf is induced in the coil and current is produced.

An electric generator converts mechanical energy to electrical energy.

Thus, the correct statement that describes the an electric generator is: A. A magnet is rotated through a coil of wire to produce an electric current.

You might be interested in

The average lifetime of μ-mesons with a speed of 0.95c is measured to be 6 x 10^6 s. Find the average lifetime of μ-mesons in a

Mnenie [13.5K]

Answer:

19.2*10^6 s

Explanation:

The equation for time dilation is:

$t = \frac{t'}{\sqrt{1-\frac{v^2}{c^2}}}$

Then, if it is observed to have a life of 6*10^6 s, and it travels at 0.95 c:

$t = \frac{6*10^6}{\sqrt{1-\frac{(0.95c)^2}{c^2}}} = 19.2*10^6 s$

It has a lifetime of 19.2*10^6 s when observed from a frame of reference in which the particle is at rest.

7 0

3 years ago

What force is needed to accelerate a 0.5kg football at a rate of 40m/s

GREYUIT [131]

Force=mass x acceleration
f= 0.5 x40
f=20N

6 0

3 years ago

The photeselestric effect is observed when light of a sufficiently high frequency is focused onto a polished metal surface, emit

Helga [31]

Answer:

$3.4\cdot 10^{-19} J$

Explanation:

In order to convert the work function of cesium from electronvolts to Joules, we must use the following conversion factor:

$1 eV = 1.6 \cdot 10^{-19} J$

In our problem, the work function of cesium is

$E=2.1 eV$

so, we can convert it into Joules by using the following proportion:

$1 eV : 1.6\cdot 10^{-19} J = 2.1 eV : x\\x=\frac{(1.6\cdot 10^{-19} J)(2.1 eV)}{1 eV}=3.4\cdot 10^{-19} J$

8 0

3 years ago

A5.0 kg TNT explosive, initially at rest, explodes into two pieces. One of the pieces weighing 2.0 kg flies off to

nordsb [41]

Answer:

v = 24 m/s, rightwards

Explanation:

Given that,

The mass of TBT explosive = 5 kg

It explodes into two pieces.

One of the pieces weighing 2.0 kg flies off to the left at 36 m/s. Let left be negative and right be positive.

The law of conservation of momentum holds here. Let v be the final speed of the remaining piece. So,

$5\times 0=2\times (-36)+3\times v\\\\-72=-3v\\\\v=24\ m/s$

So, the final speed of the remaining piece is 24 m/s and it is in the right direction.

4 0

3 years ago

Maurice pulls on the end of a spring scale. He lets go of the end and observes the spring snap back into place. What force resto

Zina [86]

Elastic

Explanation is that it is force which is snapping back

7 0

3 years ago

Read 2 more answers