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Arlecino [84]
3 years ago
5

A wire delivers 120 C of charge in 40 s.

Physics
1 answer:
Neporo4naja [7]3 years ago
3 0

Answer:

3 A

Explanation:

Charge is a product of current and time, expressed as Q=It where Q is charge in Coulombs, I is current in Amperes and t is time taken in seconds. Making I the subject of the formula then I=\frac {Q}{t}

Substituting 120 C for charge and 40 s for t thenI=\frac {120}{40}=3\ A

From the choices given, it appears that time should have been 4 s to get option A or alternatively charge should have been 1200 C

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ValentinkaMS [17]

Answer:

45 s .

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The accelerator will first accelerate , then move with uniform velocity and at last it will decelerate to rest .

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v = u + a t

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Total distance during uniform motion = 200 - ( 12.5 + 12.5 ) =  175 m .

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time during which there was uniform velocity = 175 / 5 = 35 s

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