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3 years ago

Current in an electrical circuit can effectively be reduced to zero by inserting a very high _____.

Physics

2 answers:

Novay_Z [31]3 years ago

8 0

Current in an electrical circuit can effectively be reduced to zero by inserting a very high resistance

Anastaziya [24]3 years ago

5 0

Answer:

Option (A) Resistance

Step-by-step explanation:

In an electric circuit, the resistance acts as hindrance to the current flow. If a very high amount of resistance is added into an electrical circuit, then the current can be effectively reduced to zero.

Because, current is directly proportional to Voltage & inversely proportional to resistance in a circuit. (From Ohm's law i.e. V = IR)

If V is constant, and R is increased, then I will decrease.

A high resistance will lead to current eventually becoming zero.

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un motor electric efectueaza un lucru mecanic de 864 j in 0.5 min.tensiunea la bornele sale este de 12v si este parcurs de un cu

GrogVix [38]

Answer:

96%

Explanation:

To find the values of the motor efficiency you use the following formula:

$E=\frac{P_o}{P_i}100$

P_o: output power = 864J/0.5min=864J/30s=28.8W

P_i: input power = I*V = (3A)(12V) = 36W

By replacing this values you obtain:

$E=\frac{28.8W}{30W}*100=96\%$

hence, the motor efficiency is about 96%

traslation:

Pentru a găsi valorile eficienței motorului, utilizați următoarea formulă:

P_o: putere de ieșire = 864J / 0.5min = 864J / 30s = 28.8W

P_i: putere de intrare = I * V = (3A) (12V) = 36W

Înlocuind aceste valori obțineți:

prin urmare, eficiența motorului este de aproximativ 96%

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3 years ago

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diamong [38]

Answer:

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Explanation:

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Answer:

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3 years ago

Read 2 more answers

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OlgaM077 [116]

Answer:E = hc/? = 4.41 x 10-19 J

Energy absorbed by each atom :

E (atom) = 2.205 x 10-19 J

Now Bond Energy of each molecule (B) = 3.98 x J

So, for each atom 1.99 x 10-19 J

So now

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4 years ago

HELP PLEASE <br> Find the net force necessary for a 15 kg object to accelerate at 20 m/s/s.

tensa zangetsu [6.8K]

Answer:

<h3>The answer is 300 N</h3>

Explanation:

The force acting on an object given the mass and acceleration we use the formula

<h3>force = mass × acceleration</h3>

We have

force = 15 × 20

We have the final answer as

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3 0

3 years ago