If 12V battery maintains a 4.5A current through a resistor what is the resistance of the resistor?

2.7ohms

Explanation:

Given parameters:

Voltage of the battery  = 12V

Current  = 4.5A

Unknown:

Resistance of the resistor  = ?

Solution:

From Ohm's law, we know that;

          V  = IR

V is the voltage

I is the current

R is the resistance

  So;

        R  =   =    = 2.7ohms

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2