A. B. C. D. The current I, in amperes, flowing through an alternating circuit, at a time of t seconds can be modeled by the equation I = 30 sin (bt). 1 The period of the function is seconds. 25 An electrician is asked to determine the value of b in the equation, and use the equation to determine the current at a time of 12 seconds. b Value 1 25 50T 1 25 50T sin Current at 12 sec 29.9 amperes 29.9 amperes 0.25 amperes 0.25 amperes To the nearest hundredth, the current will reach its maximum for the first time after seconds.

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Ɛz = 18 V 0.5 Q R, 2.50- R a R 1.5 0.5 N E2 = 45 V What equation do you get when you apply the loop rule to the loop abcdefgha, in terms of the variables in the figure? 0 = If the current through the top branch is Iɔ = 0.57 A, what is the current through the bottom, I3, in amps?

1Write out generic mathematical expressions for current and potential difference in a series circuit.     2What is magnetic induction?   the creation of a magnet by bringing a magnet close to another non-magnetic material   branch of physics dealing with the interaction of electric and magnetic fields   an area surrounding a magnet in which a magnetic force acts on a moving charge   a piece of metal that has atoms aligned such that it attracts other pieces of metal   3A square boat of area = 2 m2 floats on the water with 1 m of boat submerged in the water. Estimate the buoyant force on the boat and the pressure at the bottom of the boat. The density of water is 997 kg/m3.   Fb = 30,000 N and P = 20,000 Pa   Fb = 10,000 N and P = 20,000 Pa   Fb = 100 N and P = 200 Pa   Fb = 20,000 N and P = 10,000 Pa professor can you answer these 3 questions please?

A current I flows around the rectangular loop shown in the accompanying figure. B A D Write expressions for B . dl for the paths A, B , C and D A: B: C: D:

It takes 2.27 ms for the current in an LR circuit to increase from zero to 0.73 its maximum value. Part A Determine the time constant of the circuit. Express your answer to two significant figures and include the appropriate units. ? Value Units T = Submit Request Answer Part B Determine the resistance of the circuit if 33.0 mH . Express your answer to two significant figures and include the appropriate units. HA ? R = Value Units Submit Request Answer

QUESTION 20 In a DC circuit with a single resistor, a current of 13 Amperes flows through a point in the circuit. After a time of 10 minutes, which of these expressions yields how much charge has flowed through the point in this time in SI units?   a. 13 divided by 10   b. 13 times 600   c. 13 times 10

I am doing physics homework and am stuck on this part! Help would be great, thank you!

The motor in a toy car operates on 6.00 V, developing a 4.70 V back emf at normal speed. If it draws 3.00 A at normal speed, what current (in A) does it draw when starting? ____________  A

10.8 cm, v = 4.86 m/s, and B = the resistance of the rails is neglibly small and the resistance of the rod is R = 415 mN, what is the magnitude of the current 3. Assume that L 1.18 T. If in the circuit? в А. О.50 A В. 1.0 А С. 1.5 А D. 2.0 A 3.