(a) The sliding bar in the figure has a length of 0.511 m and moves at 2.18 m/s

Question

(a) The sliding bar in the figure has a length of 0.511 m and moves at 2.18 m/s in a magnetic field of magnitude 0.278 T. Using the concept of motional emf, find the induced voltage in the moving rod 0.310 (b) If the resistance in the circuit is 0.299 ?, find the current in the circuit and the power delivered to the resistor. (Note: The current, in this case, goes counterclockwise around the loop.) I = 1.037 0.321 (c) Calculate the magnetic force on the bar magnitude 1.473e-1 direction "X (d) Use the concepts of work and power to calculate the applied force 1.47e-1 EXERCISE HINTS: GETTING STARTED I'M STUCK! Suppose the current suddenly increases to 1.83 A in the same direction as before, due to an increase in speed of the bar. (Use the information from the PRACTICE IT part.) (a) Find the emf induced in the rod new = What is the relationship between current through and voltage across a wire? V (b) Find the new speed of the rod Vnew What is Enter a number ip between the speed of the bar and the emf induced across it? m/s

Explanation / Answer

(A) e = I R

e = 1.83 x 0.299

e = 0.55 Volt

(B) e = B Lv

0.55 = (0.278)(0.511) v

v = 3.85 m/s

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