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Answer
The resistance is directly proportional to the length of the wire. This means that if the length increased so does the resistance. They are linked by the equation R is directly proportional to length over area R=l/a. so this means that the 30cm wire will have thrice the resistance of the 10cm wire if the area of cross-section of both thee wires is the same.
Factors affecting resistance
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Recommended Lesson
If a body dropped freely then what is the velocity of the body after 2s
Answer
Since the acceleration of free fall is 10m/s^2.
After 2 seconds the acceleration becomes 10 into 2 which becomes 20m/s.
How to Solve a Free Fall Problem - Simple Example
Neglecting the effects due to air resistance, we determine the impact speed of a dropped object using kinematic equations.