How does the current in a resistor change if the voltage across the resistor is

Physics

1 answer:

andrey2020 [161]3 years ago

3 0

Answer:

increases by a factor of 4.

Explanation:

The power dissipated through a resistor is I2RI2R

Current=IResistance=RPower=(current)2×(resistance)=I2RIf we double the current, P=(2I)2R=4I2RCurrent=IResistance=RPower=(current)2×(resistance)=I2RIf we double the current, P=(2I)2R=4I2R

Thus, doubling the current increases the power dissipated through a resistor by a factor of four.

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A string exerts a force of 20 N on a box at an angle of 38° from the horizontal. What is the horizontal

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Answer:

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Explanation:

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Suppose the entire solar nebula had cooled to 50 K before the solar wind cleared the early solar system of its gases. How would

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Explanation:

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A man takes 20 seconds to climb 5m up a ladder. He weighs 720N. Calculate the power he must deliver to do this.

Inessa05 [86]

Answer:

180 W

Explanation:

The work done by the man against gravity is equal to its gain in gravitational potential energy:

$W=mg\Delta h$