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3 years ago

10

Will an electromagnet be obtained if steel is placed inside the solenoid?

1 answer:

iogann1982 [59]3 years ago

7 0

Answer:A solenoid is a simple electromagnetic device consisting of a coiled electric wire, wrapped in a 3D circular pattern. When electric current is passed through the wire, the solenoid acts like a magnet with N and S poles at the ends of the coil.

When a ferromagnetic material rod is permanently placed inside the solenoid, the metal greatly increases the magnetic effect and becomes a permanent electromagnet. Moreover, it can also be used as an electrical switch by drawing in or pushing out a ferromagnetic material like an iron rod. Depending on the directions of the rod and the electrical current the switching action takes place.

Given figure represents the solenoid as electromagnet and the switching action.

Explanation:

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If a force of 250N is applied to a piano being pushed up a ramp at an angle of 18degrees above the horizontal, what force is bei

klasskru [66]

answer

77.25 N

explanation

(look at picture for free body diagram)

the force on the piano has both vertical and horizontal components, and since the questions asks about the force to lift the piano, we want to find the vertical component

we can use trigonometry where sinA = opposite/hypotenuse

A = 18 degrees

hypotenuse = 250 N

sin18 = opposite (vertical component) / 250

vertical component = sin18 * 250

= 77.25 N

4 0

3 years ago

The earth exerts a gravitational force of 850N on John. What is Johns mass in kg

Travka [436]

Answer:

86.73 kg

Explanation:

Remember that F=mg

Let's plugin our numbers

850N=m9.8m/s^2

850N=9.8m/s^2m

86.73=m

5 0

2 years ago

An electromagnetic wave is a kind of a wave which,

Harman [31]

Explanation:

Electromagnetic waves are waves that propagate through space while an electric field and a magnetic field interact with each other.

please mark as brainliest plzz

7 0

3 years ago

Read 2 more answers

How would you measure the potential difference across a resistor?

coldgirl [10]

You would need to connect a potential difference across a resistor in parallel

8 0

3 years ago

A 1000-kg car traveling north at 15 m/s collides with a2000-kg truck traveling east at 10 m/s. The occupants, wearing seat belts

Aleksandr-060686 [28]

Answer:

8.33 m/s, 36.87° North of East

Explanation:

$m_n$ = Mass of car = 1000 kg

$v_n$ = Velocity of car = 15 m/s

$m_e$ = Mass of truck = 2000 kg

$v_e$ = Velocity of truck = 10 m/s

M = Combined mass = 1000+2000 = 3000 kg

Momentum

$p_n=m_nv_n\\\Rightarrow p_n=1000\times 15\\\Rightarrow p_n=15000\ kgm/s$

Momentum of car traveling East is 15000 kgm/s

$p_e=m_ev_e\\\Rightarrow p_n=2000\times 10\\\Rightarrow p_n=20000\ kgm/s$

Momentum of truck traveling North is 20000 kgm/s

Angle

$\theta=tan^{-1}\frac{p_n}{p_e}\\\Rightarrow \theta=tan^{-1}\frac{15000}{20000}\\\Rightarrow \theta=36.87^{\circ}$

As the two vehicles are vectors, the resultant velocity is

$(Mv)^2=p_n^2+p_e^2\\\Rightarrow v=\sqrt{\frac{p_n^2+p_e^2}{M^2}}\\\Rightarrow v=\sqrt{\frac{15000^2+20000^2}{3000^2}}\\\Rightarrow v=8.33\ m/s$

Velocity of the two vehicles when they are locked together is 8.33 m/s and direction is 36.87° North of East

5 0

3 years ago