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3 years ago

7

Which of the following scenarios will cause the current to stop flowing within a circuit?

2 answers:

Lelechka [254]3 years ago

8 0

C is correct. Only a closed circuit can carry current, opening a switch disconnects the circuit and stops current from flowing. Remember, all current flows in loops, if you can't make a loop out of it, current can't flow, and opening a switch, assuming no other paths for current exist, will completely stop the current.

Helga [31]3 years ago

7 0

The correct answer is C

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A car travels 150 meters East of its original starting position in 15s. What is the cars velocity?

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Answer:

it is 347

Explanation:

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a light bulb has a resistance of 360 . what is the current in the bulb when it has a potential difference of 120 v across it? 0.

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3 years ago

A flexible loop has a radius of 10.5 cm and it is in a magnetic field of B = 0.117 T. The loop is grasped at points A and B and

MAXImum [283]

Explanation:

Given that,

Radius = 10.5 cm

Magnetic field = 0.117 T

Time = 0.243 s

After stretched, area is zero

(I). We need to calculate the magnetic flux through the loop before stretched

Using formula of magnetic flux

$\phi=B\times A$

$\phi=B\times \pi r^2$

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r = radius

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$\phi=0.117\times3.14\times(10.5\times10^{-2})^2$

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(II). We need to calculate the magnetic flux through the loop after stretched

$\phi=B\times A$

Here, A = 0

$\phi=0$

So, The magnetic flux through the loop after stretched is zero.

(III). We need to calculate the magnitude of the average induced electromotive force

Using formula of the induced electromotive force

$\epsilon=-\dfrac{d\phi}{dt}$

$\epsilon=-\dfrac{\phi_{after}-\phi_{before}}{t}$

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3 years ago

zhuklara [117]

Answer:

D

Explanation:

the total speed and the total mass of the entire system remain the same weather one object is moving or stationary.

When two or more objects collide, the collision does not change the

total momentum of the two objects.

Whatever momentum is lost by one object in the collision is gained

by the other. The total momentum of the system is conserved.

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