Question

Question 1

Question 1 Not yet answered Marked out of 4.00 Flag question If the number density of electrons in a wire is n 1.00 x 1028 m-3, at what drift velocity must they travel through a wire of diameter d 0.560 mm to deliver a current of 7.20 A? Give your answer in mm s1 to 3 significant figures Take T 3.14, and the magnitude of the charge on an electron e 1.60 x 10-19 C. (4 marks) Drift velocity mm s1

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Please number each question. Thank you

Answer 1

Question No 01:-

Drift velocity is given by

Vd = I/(neA) = 7.20A/(1*10^28m^-3*1.6*10^-19C*π(0.560*10^-3/2)^2)

= 4.567*10^-3 m/s

Question no :02

Magnetic force is given by F = Bil*sin©

when © = 90°

F = 0.710*3.40*57*10^-3*sin90° = 0.1376 N

when sin© = 30

F = 0.710*3.40*57*10^-3sin30° = 0.0688 N

Question 03:-

Power delivered = V^2/R = 350^2/0.170 = 0.1721 MW