Aflashlight draws 0.133 a from a 3.0-v battery pack in 2.0 minutes (a) how much charge flows from the battery (b) how much energy does the battery supply, (c) how many electrons have passed any point in the circuit every second? x 10 electrons

(a) 15.96 C (B)47.88 J (C)

Explanation:

We have given current i =0.133 A

Voltage of the battery V =3 volt

Time t=2 minute=2×60=120 sec

(a) We have to find the charge

charge Q = current ×time

So

(B) The energy supplied by the battery

Energy = charge ×potential difference

So

(C) We know that charge on one electron

So number of electron

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

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