1) In a closed circuit (that consists of a electric heater, a metal conducting r

Question

1) In a closed circuit (that consists of a electric heater, a metal conducting rod, and two rails), it must have an outside force applied to keep the rod moving at a constant speed. The heater has 6 ? of resistance (R) and will use 15 W of power (P) in the process. The metal conducting rod has a length (L) of 1.2 m and is still moving at a constant speed (to the right) through at the magnetic field. The magnetic field has a strength of 2.4 T.

a)      What is the velocity of the moving conducting rod?

b)     In order to keep the rod moving to the right (at a constant speed to overcome), what force (F) must be applied to the rod?

Explanation / Answer

a)p = i^2*r ===> i = sqrt(p/r) = 1.58 A

e = i*r = 9.48 Volts

e = B*v*L ===> v = e/(B*L) = 3.29 m/s

b) p = F*v ===> F = p/v = 4.56 N

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.