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frez [133]
3 years ago
14

Which configuration would produce an electric current? A) Rotate a coil of copper wire between two magnets. B) Connect a wire be

tween a copper and zinc strip sitting in a beaker of water. C) Connect a wire to the (+) positive end of a battery and the other end to a light bulb. D) Connect a wire to the (-) negative end of a battery and the other end to a light bulb.
Physics
2 answers:
Lelu [443]3 years ago
8 0

Answer:

A.) Rotate a coil of copper wire between two magnets.

Explanation:

Rotating a coil of copper wire between two magnets would produce an electric current. This is an example of electromagnetic induction.

FrozenT [24]3 years ago
4 0

the answer is (A) the movement of the magnet relative to the coil

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3 years ago
If an object is thrown upward with an initial velocity of 128 ​ft/second, then its height after t seconds is given by the follow
IrinaK [193]

Answer:

The maximum height attained by the object and the number of seconds are 128 ft and 4 sec.

Explanation:

Given that,

Initial velocity u= 128 ft/sec

Equation of height

h = 128t-32t^2....(I)

(a). We need to calculate the maximum height

Firstly we need to calculate the time

\dfrac{dh}{dt}=0

From equation (I)

\dfrac{dh}{dt}=128-64t

128-64t=0

t=\dfrac{128}{64}

t=2\ sec

Now, for maximum height

Put the value of t in equation (I)

h =128\times2-32\times4

h=128\ ft

(b). The number of seconds it takes the object to hit the ground.

We know that, when the object reaches ground the height becomes zero

128t-32t^2=0

t(128-32t)=0

128=32t

t=4\ sec

Hence, The maximum height attained by the object and the number of seconds are 128 ft and 4 sec.

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3 years ago
10. Solve the following numerical problems
frosja888 [35]

Answer:

\boxed {\boxed {\sf 120 \ Joules}}

Explanation:

Work is equal to the product of force and distance.

W=F*d

The force is 8 Newtons and the distance is 15 meters.

F= 8 \ N \\d= 15 \ m

Substitute the values into the formula.

W= 8 \ N * 15 \ m

Multiply.

W= 120 \ N*m

  • 1 Newton meter is equal to 1 Joule
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W= 120 \ J

The work done is <u>120 Joules</u>

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