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2 years ago

What precautions should be taken to avoid the overloading of domestic electric circuits.

Engineering

1 answer:

madam [21]2 years ago

4 0

The precautions that should be taken to avoid the overloading of domestic electric circuits are:

Do not put high voltage wires in one socket.
Do not use many electric appliances of high power at the same time.

<h3>What are electric circuits?</h3>

Electric circuits are wires or devices that give electricity to devices that run on electricity. Running of electric devices should be done carefully because our body can come in contact with the current.

Thus, the precautions are to keep high voltage lines away from one socket. Use only a few high-power electric appliances at once.

To learn more about electric circuits, refer to the below link:

brainly.com/question/28221759

#SPJ4

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CAN SOMEONE GIVE ME AND ANSWER AND EXPLANTION FOR ALL THESE QUESTIONS PLEASE, I AM STRUGGLING

-BARSIC- [3]

Answer:

13.) 44V

14.) 66V

15.) 9A

16.) 12V

Explanation:

Concepts you need to know:

1. Resistors in series can be combined by summing up their values.

2. The current always stays the same when the resistors are in series.

3. Ohms Law: $V = IR$

13.) We know that the resistors are in series so we can combine them into a single big resistor. We got R₄ = R₃+R₂+R₁ = 2+4+5 = 11Ω.

We also know that current is the same in a series of resistors, so there's 4A going through the entire circuit.

Using ohm's law, we can calculate V = IR = (4)(11) = 44V

14.) Same explanation as part (13). Except now the current is I=6A. All we have to do is to replace the previous I=4 to I=6.

V = IR = (6)(11) = 66V

15.) Again, we know that current is the same when resistors are in series. So if you can find the current through R1 then that's the same current throughout the entire circuit.

We're given E₁=18V, so...

I = V/R = E₁/R₁ = 18/2 = 9A

this means 9A will also flow through R₃.

16.) Same concept as part (15). We know that E₃=15V, so lets find the current.

I = V/R = E₃/R₃ = 15/5 = 3A

Since current is same throughout the circuit, I₁=3A as well. Use this to calculate the voltage through R₁.

V = IR = I₁R₁ = (3)(2) = 6V

6 0

3 years ago

The free convection heat transfer coefficient on a thin hot vertical plate suspended in still air can be determined from observa

damaskus [11]

Answer:

h = 6.35 W/m².k

Explanation:

In order to solve this problem, we will use energy balance, taking the thin hot plate as a system. According to energy balance, the rate of heat transfer to surrounding through convection must be equal to the energy stored in the plate:

Rate of Heat Transfer Through Convection = Energy Stored in Plate

- h A (Ts - T₀) = m C dT/dt

where,

h = convection heat transfer coefficient = ?

A = Surface area of plate through which heat transfer takes place = 2 x 0.3 m x 0.3 m (2 is multiplied for two sides of thin plate) = 0.18 m²

Ts = Surface Temperature of hot thin plate = 225⁰C

T₀ = Ambient Temperature = 25°C

m = mass of plate = 3.75 kg

C = Specific Heat = 2770 J/kg. k

dT/dt = rate of change in plate temperature = - 0.022 K/s

Therefore,

- h (0.18 m²)(225 - 25) k = (3.75 kg)(2770 J/kg.k)(- 0.022 k/s)

h = (- 228.525 W)/(- 36 m².k)

4 0

3 years ago

Match the following light concepts

Gelneren [198K]

Answer:

- Light is bounced back at same angle (Classical Reflection)

- Light penetrates medium at different angle due to different material densities (Refraction)

Light bounces at different angles in periodic grid (Reflected Diffraction)

Light enters medium at different angles through a grid (Transmission Diffraction)

- Light EMF field looses one axis component (Polarized filter)

Explanation:

Reflection is a phenomenon in which waves (light included) bounce back from an obstacle at the same angle of incidence

Refraction is the change in the angle of a wave as it enters the interface of two media. The change in angle is due to the difference in the densities of the two media.

Reflected diffraction occurs when an optical component with a periodic grid, splits, and diffracts light into several beams travelling in different directions. The light light bounces at an angle in the periodic grid.

Transmission diffraction is dispersion a beam of various wavelengths into a spectrum of associated lines due to the principle of diffraction. In this type of diffraction, light enters medium at different angles through a grid.

Polarized filters removes one field from the incidence electromagnetic wave like light, leaving it to vibrate in only one plane.

6 0

4 years ago

What's the real power if Vrms = 100V, Irms = 2A, and the circuit has a power factor of 0.8?

Temka [501]

Answer:

160 W

Explanation:

The relation is ...

Real Power = (pf)(V)(A)

= 0.8(100)(2) = 160 . . . . watts

7 0

3 years ago

what are some questions about simple machines that don't make me sound like i didn't pay attention in the lesson?

Margaret [11]

Answer:

what are simple machines?

Explanation:

it is 2020 let's be honest all

8 0

3 years ago