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3 years ago

How much work will be done by electric energy source with a P.d of 4KV that delivers a current of 1 A for 1 minute?

Physics

1 answer:

Lynna [10]3 years ago

6 0

Answer:

Given that battery V = 12.0 V

Resistance R = 2.0 ohms

a ) current in the battery is I = V /R

= 12.0 V / 2.0

= 6.0 A

b ) charge transported in the circuit is q = i * t

= 6.0 A * 10 s

= 60 C

c ) Work done on the charge by the electric field is 0 ( there is no internal resistance )

d ) work done through the resistor is w = P * t

= ( V)^2 / R * t

= ( 12.0 V )^2 / 2 *10s

= 720J

e ) Total work done is equal to work done through the resistor

W_total = 720 J

f ) there is no internal resistance hence E = 0

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3 years ago

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MArishka [77]

Answer:

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Explanation:

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Thus resistance will be R = ρ $\frac{L}{A}$

where A = π $r^2$

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3 years ago

A column of soldiers, marching at 114 steps per minute, keep in step with the beat of a drummer at the head of the column. It is

kipiarov [429]

Answer:

length of column is 140.42 m

Explanation:

in 1 min the soldiers travels 114 steps

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