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3 years ago

To prevent accidental electric shock, most electrical equipment is A. painted. B. isolated. C. coated. D. grounded.

Physics

2 answers:

Nesterboy [21]3 years ago

4 0

D. It is Grounded below ground

Aleksandr [31]3 years ago

4 0

Answer:

Grounded

Explanation:

Three wires are use while wiring and even in appliances. They are live, neutral and earthing wire.

Grounding or earthing is the process through which we safeguard us from electric shock.

The earthing wire is directly connected to a box buried in ground at certain level So any kind of leakage current that can cause shock will directly pass to the ground making equipment and humans safe.

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The periodic table is arranged by the number of neutrons is that statement true

DanielleElmas [232]

i guess that would be false cause ...

the elements in periodic table are arranged by atomic number which is basically the number of protons

hope that helps :)

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2 years ago

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A square coil (length of side = 24 cm) of wire consisting of two turns is placed in a uniform magnetic field that makes an angle

kupik [55]

Answer:

The magnitude of the emf induced in the coil is 60 mV.

Explanation:

We have,

Side of the square coil, a = 24 cm = 0.24 m

Number of turns in the coil, N = 2

It is placed in a uniform magnetic field that makes an angle of 60 degrees with the plane of the coil. If the magnitude of this field increases by 6.0 mT every 10 ms, we need to find the magnitude of the emf induced in the coil.

We know that the induced emf is given by the rate of change of magnetic flux throughout the coil. So,

$\epsilon=N\dfrac{d\phi}{dt}\\\\\epsilon=N\dfrac{d(BA\cos \theta)}{dt}$

$\theta$ is the angle between magnetic field and the normal to area vector.

But in this case, a uniform magnetic field that makes an angle of 60 degrees with the plane of the coil. So, the angle between magnetic field and the normal to area vector is 90-60=30 degrees.

Now, induced emf becomes :

$\epsilon=N\dfrac{d(BA\cos \theta)}{dt}\\\\\epsilon=NA\dfrac{dB}{dt}\cos \theta\\\\\epsilon=2\times (0.24)^2\times \dfrac{6\times 10^{-3}}{10\times 10^{-3}}\times \cos (30)\\\\\epsilon=0.0598\ V\\\\\epsilon=59.8\ V$

$\epsilon=60\ mV$

So, the magnitude of the emf induced in the coil is 60 mV. Hence, this is the required solution.

5 0

3 years ago

An airplane flies with a constant speed of 560 miles per hour. How far can it travel in 1 1/2 hours?

Alik [6]

You would multiply the speed by the time. So the answer would be 840 miles.

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3 years ago

A child rides her bike at a rate of 12.0 km/hr down the street. A squirrel suddenly runs in front of her so she applies the brak

Sedbober [7]

By v = u - at
=>8 = 12 - a x 0.25 
=>a = 4/0.25 km/hr/sec 
=>a = 16km/hr/sec

I hope this helped!

3 0

3 years ago

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A temperature of 200 degrees F is equivalent to approximately

Ann [662]

(1) Changing Fahrenheit to Celsius:
The formula used to convert from Fahrenheit to Celsius is as follows:
C = (F - 32) * 5/9
We are given that F=200, substitute in the above formula to get the corresponding temperature in Celsius as follows:
C = (200-32) * (5/9) = 93.333334 degrees Celsius

(2) Changing the Fahrenheit to kelvin:
The formula used to convert from Fahrenheit to kelvin is as follows:
K = (F - 32) * 5/9 + 273.15
We are given that F = 200. substitute in the above formula to get the corresponding temperature in kelvin as follows:
K = (200-32)*(5/9) + 273.15 = 366.483334 degrees kelvin

5 0

3 years ago

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