The resistance of resistor is greater for: a. Short and thin resistor
b. Short and thick resistor
c. Long and thin resistor
d. None

c: long and thin resistor.

Explanation:

The resistance of a resistor is given by:

R = ρ*L/A

where:

R = resistance

ρ = resistivity (depends on the material)

L =  length of the material

A = cross-sectional area of the material

We can see that the length is on the numerator, which means that if we increase the length, then the resistance is increased.

We also can see that the cross-sectional area is on the denominator, then if we increase the area (for example, with a ticker resistor) the resistance decreases.

Then if we want to maximize the resistance, we need to have a long and thin resistor, so the correct answer is c.

c.the charges if the proton and electron and gravity

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s