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3 years ago

How can a magnetic field be used to create an electric current

1 answer:

6 0

Electric current produces a magnetic field. This magnetic field can be visualized as a pattern of circular field lines surrounding a wire. One way to explore the direction of a magnetic field is with a compass, as shown by a long straight current-carrying wire in.

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An object is thrown directly up (positive direction) with a velocity (v o ) of 20.0 m/s and d o = 0. How high does it rise (v =

Lelechka [254]

Answer:

h=20.38 m

Explanation:

Given that

Initial speed of object u = 20 m/s

Acceleration $g= 9.8\ \frac{m}{s^2}$

We know that

$v^2=u^2-2gh$

Here acceleration and velocity is in opposite direction so the object will come rest after reaching at distance h.When body will reach at its highest position then velocity will become zero(v=0).

Now by putting the values

$v^2=u^2-2gh$

$0 =20^2-2\times 9.1\times h$

h=20.38 m

5 0

3 years ago

What is the main function of a telescope?

Gwar [14]

Answer:

Explanation:The main purpose of astronomical telescope is to make objects from outer space appear as bright, contrasty and large as possible. That defines its three main function: light gathering, resolution and magnification. These are the measure of its efficiency.

3 0

3 years ago

What is an example of a non contact force

olchik [2.2K]

Answer: Gravitational force

Explanation:

A non contact force can be described as a force applied to an object by another body that is not in direct contact with it.

For example, an object thrown upwards will return back due to the force of gravity acting on it. So, it means Gravitational force is acting on the body without necessarily being in contact with that body.

8 0

4 years ago

When a current flows through a metal wire, the moving charges are When a current flows through a metal wire, the moving charges

allochka39001 [22]

Answer:

Only electrons

Explanation:

When a current flows through a metal wire, the moving charges are electrons since electric current is the flow of electric charge in an electric circuit. This electric charge are therefore electrons.

8 0

4 years ago

You expend 1000 w of power moving a piano 10 meters in 5 seconds. how much force do you exert

Vinvika [58]

Answer:

Force, F = 500 N

Explanation:

Given that,

Power expanded, P = 1000 W

Distance moved by piano, d = 10 m

Time taken, t = 5 s

To find,

The force exerted by the person

Solution,

The rate at which the work is being done is called power delivered. Its formula is given by:

$P=\dfrac{W}{t}$

W is the work done, W = F × d

$P=\dfrac{Fd}{t}$

On rearranging the above formula to find F as :

$F=\dfrac{P t}{d}$

$F=\dfrac{1000\times 5}{10}$

F = 500 N

Therefore, the force exerted on the person is 500 N. Hence, this is the required solution.

7 0

3 years ago