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3 years ago

You doubled the voltage frequency in an RL series AC circuit, the inductive resistance would?

Engineering

2 answers:

Vesna [10]3 years ago

7 0

Answer:

When the voltage frequency is doubled, the resistance will remain same in RL series AC circuit.

Explanation:

A circuit that has an inductance L and Resistance R is said to be a RL or LR circuit. The inductance in the circuit is directly proportional to the Frequency F and Inductive Reactance XL of the circuit.

$\mathrm{XL}=2 \times \pi \times \mathrm{F} \times \mathrm{L}$

So, whenever there is a change in the frequency it directly changes the inductance and inductive reactance of the circuit but Resistance will remain unaffected.

Resistance in a RL circuit is independent of the frequency. Therefore, in the given case, the resistance will remain the same only the reactance will get doubled.

Ivenika [448]3 years ago

6 0

Answer:

Remain the same.

Explanation:

If you doubled the voltage frequency in an RL series AC circuit, the inductive resistance would remain the same.

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At what distance from the Earth’s surface is a 10,000 kg satellite if its potential energy is equal to –5.58 x 1011 J? (choose t

Maksim231197 [3]

Answer:

Option D

Explanation:

As we know

Gravitational Constant (G) $= 6.67*10^{11}$

Mass of Earth (M) $= 5.98*10^{24}$

Weight of satellite (m) $= 10,000$ Kg

Radius of Earth (R) = $6.378*10^6$

Distance of satellite from Earth = $\frac{GMm}{R} - U$

Substituting the given values, we get

$D=\frac{(-((6.67*10^{11})(5.98*10^{24})(10000))}{(6.378*10^6)} - (-5.58*10^{11})\\\\0.625*10^{3}$ Km

or 635 m

The correct answer is option D

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3 years ago

List two reasons why machined parts often require a high degree of precision.

Gekata [30.6K]

Explanation:

Precision machining is a subtractive process used in cases where material needs to be removed from a raw product to create the finished product. Precision machining can be used to create a wide variety of products, items, and parts for any number of different objects and materials. These parts usually require tight tolerances variation from nominal dimensions and from part to part, which means that there is not much room for error in the production of the piece. Repeatability and well-controlled tolerances are hallmarks of precision machining. Components, parts and finished durable products that are designed to maintain extremely tight tolerance margins and a high degree of durability are essential and common drivers for utilization of precision machining. For example, parts that need to work together as part of a machine may need to always align within a certain margin of 0.01mm to 0.05mm. Precision engineering and machining help to ensure these parts can not only be made precisely but can be produced with this level of accuracy over and over again.

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3 years ago

Steel balls 10 mm in diameter are annealed by heating to 1150 k and then slowly cooling to 450 k in an air environment for which

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Answer:

The answer is below

Explanation:

Given that:

ρ = 800 kg/m3, c = 600 J/kg-K, k = 40 W/m-K, Initial temperature = Ti = 1150,

Environment temperature = T = 450 K, Final temperature = T∞ = 325 K

Diameter = 10 mm = 0.01 m, A = 6

The estimated time for cooling process (t) is given as:

$t=\frac{\rho dc}{hA} ln\frac{T_i-T_\infty}{T-T_infty}=\frac{7800*0.01*600}{25*6} ln\frac{1150-325}{450-325}\\ \\t=589\ s\\t=0.1635\ h$

The estimated cooling time is 589 s

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3 years ago

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Answer and Explanation:

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Minimization of wear and tear on taps
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3 years ago

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