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2 years ago

Which is an advantage of AC over DC power?

Physics

2 answers:

CaHeK987 [17]2 years ago

6 0

Answer:

The correct choice is

A. AC voltage can be transformed into other voltages through transformers.

Explanation:

We can convert an AC Voltage to other higher or lower voltage making use of a step up or step down transformer. Electricity is transferred over long distances at high voltages as the losses are minimum at high voltage. The electricity can not be used in households at such high voltage. So the high voltage is converted to low voltage using transformers. This can only be done in case of AC Power.

Zanzabum2 years ago

4 0

Its A......................................................................................

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2 years ago

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2 years ago

The dark bands on the wall are from ______________ interference. and i will give brainlyest

Fittoniya [83]

Light can be seen as an electromagnetic wave.
What happens when two waves, with the same frequency, superpose is called interference.

If at a certain point two waves arrive both with a crest, we have constructive interference and the amplitudes sum up, reaching the maximum value, resulting in bright spots.

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Therefore, t<span>he dark bands on the wall are from destructive interference.</span>

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3 years ago

A horizontal spring is lying on a frictionless surface. One end of the spring is attached to a wall, and the other end is connec

juin [17]

Answer:

Explanation:

Given that:

angular frequency = 11.3 rad/s

Spring constant (k) = $= \omega^2 \times m$

k = (11.3)² m

k = 127.7 m

where;

$x_1$ = 0.065 m

$x_2$ = 0.048 m

According to the conservation of energies;

$E_1=E_2$

∴

$\Big(\dfrac{1}{2} \Big) kx_1^2 =\Big(\dfrac{1}{2} \Big) mv_2^2 + \Big(\dfrac{1}{2} \Big) kx_2^2$

$kx_1^2 = mv_2^2 + kx_2^2$

$(127.7 \ m) \times 0.065^2 = v_2^2 + (127.7 \ m) \times 0.048^2$

$0.5395325 = v_2^2 +0.2942208 \\ \\ 0.5395325 - 0.2942208 = v_2^2 \\ \\ v_2^2 = 0.2453117 \\ \\ v_2 = \sqrt{0.2453117} \\ \\ \mathbf{ v_2 \simeq0.50 \ m/s}$

4 0

2 years ago

If you double the voltage in a circuit and reduce the resistance by a factor of four what will happen to the current? A) it will

KatRina [158]

By Ohm's Law, we can relate current, voltage and resistance. It is expressed as V=IR. That is, there is a direct relationship between voltage and resistance and voltage and current.

V = IR
V1/2V1 = I1R1 / I2R1/4
1/2 = 4I1/I2
I2 = 8I1

Therefore, <span> it will increase by a factor of 8. Hope this answers the question.</span>

5 0

2 years ago