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3 years ago

Find the resistance of a stereo: current is 7 A voltage is 49 V.

Physics

1 answer:

pochemuha3 years ago

5 0

Answer:

R = 7 [amp]

Explanation:

To solve this problem we must use ohm's law which tells us that the voltage is equal to the product of the current by the resistance. In this way, we have the following equation.

V = I*R

where:

V = voltage = 49 [V] (units of volts)

I = current = 7 [amp] (amperes)

R = resistance [ohms]

Now clearing R.

R =V/I

R = 49/7

R = 7 [amp]

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gtnhenbr [62]

Answer:

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$2.898\times 10^{-10}\ \text{m}$ x-ray region

Explanation:

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$T=10^4\ \text{K}$

From Wein's law we have

$\lambda=\dfrac{b}{T}\\\Rightarrow \lambda=\dfrac{2.898\times 10^{-3}}{10^4}\\\Rightarrow \lambda=2.898\times 10^{-7}\ \text{m}$

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$\lambda=\dfrac{2.898\times 10^{-3}}{10^7}\\\Rightarrow \lambda=2.898\times 10^{-10}\ \text{m}$

The wavelength of the radiation will be $2.898\times 10^{-10}\ \text{m}$ and it is in the x-ray region.

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2 years ago

What happens when the voltage increases and the resistance stays the same in a electrical circuit?

Orlov [11]

Answer:

The current in the circuit increases

Explanation:

The ohm's law states that the potential across a circuit is proportional to the current in the circuit.

V ∝ I

Where 'V' is the potential difference across the circuit and 'I' is the current in the circuit.

The proportionality constant present in the equation is the resistance of the circuit. Hence, the equation becomes

V = IR

According to the equation, when V is directly proportional to 'I' where 'R' remains as constant, then the change in 'V is brings change in 'I' to make the equation valid.

So, when there is an increase in the voltage, the current on the circuit increases.

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2 years ago

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ratelena [41]

Answer:

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Explanation:

Because if Rock A can scratch Rock B then it obviously means that Rock A is harder.

Right?

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2 years ago

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2 years ago

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SCORPION-xisa [38]

Answer:

0.046

Explanation:

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d = 6m/s / 130s

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2 years ago