This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: LAST NAME: STUDENT NR: PHYS 1010 6.0: CLASS TEST 6 Time: 50 minutes; Calculators & formulae provided at the end = only aid; Total = 20 points. 1) A current loop with a resistance R = 250 Ω and an area A = 0 . 4 m 2 is oriented perpendicular to a magnetic field that varies in time according to B ( t ) = 0 . 5 t (1 t ) ( t and B are in SI units). What is the current induced in the loop at t = 0 s, at t = 0 . 5 s, and at t = 1 s? 1 2) A circular loop of wire lies in the x y plane so that the axis of the loop lies along z . A homogeneous (spatially uniform) magnetic field B ( t ) is antiparallel to the zaxis. ( B z ( t ) < 0, B x = B y = 0). If B ( t ) is decreasing with time, what is the direction of the induced current when viewed from above? Start with a drawing, and explain your steps and reasoning! 3) Two inductors L 1 and L 2 are connected in series to form an equivalent inductor L eq . Together they are connected to a battery of voltage Δ V B via a switch. Draw a circuit diagram depicting the situation. Formulate Kirchhoff’s loop law for the circuit. Derive how L eq depends on L 1 and L 2 . 2 ... 4a) Consider a simple LC circuit (L and C in parallel) with values C = 1500 pF and L = 20 mH. At t = 0 the current is I = 45 mA and the charge on C is zero. Calculate the= 45 mA and the charge on C is zero....
View
Full Document
 Spring '09
 WIJNGAARDEN
 Physics, Current, Resistance, Trigraph, uel, τz, dt df dt, dt dI dt

Click to edit the document details