Answer:
D
Explanation:
power is the work done per time taken,
Work done is measured in Joules, Nm
time is measured is seconds s
(Nm)/s
Both move with constant speed
(2nd variant, 7kg is 3 times faster than 21kg)
Resistor X is the same material and thickness as resistor Y, but it is twice as long. The resistance of resistor X is double that of resistor Y.Option 2 is correct.
<h3>What is resistance?</h3>
Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.
The relation of the resistance with the length and thickness is;
For the given case;
Resistor X has the same thickness and is made of the same material as resistor Y but has twice the length. Resistor X has twice the resistance of resistor Y.
Hence,option 2 is correct.
To learn more about the resistance refer to the link;
brainly.com/question/20708652
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