15.A device consists of a 100-Ω resistor and a capacitor in series. If this device is designed to go from on-state to off-state (capacitor is fully discharged) within 10 μs. The capacitance can be (A) 0.001 μF (B) 0.005 μF (C) 0.01 μF (D) 0.05 μF (E) 0.1 μF (multiple choice)

1.In the figure shown on the right, a wire is extended from y = -(a+L) to y = a+L and is bent as a semicircle in the xy plane. If the wire carries a current I flowing along the direction indicated by the arrows and the magnetic flux density B in the region is along the +z direction, determine the magnetic force acting on the semicircular arc with the following parameters: I = 2 A, B = 5 T, a = 1 m, L = 2 m. (A) 10 Nt (B) 20 Nt (C) 30 Nt (D) 40 Nt (E) 5 Nt

15.A device consists of a 100-Ω resistor and a capacitor in series. If this device is designed to go from on-state to off-state (capacitor is fully discharged) within 10 μs. The capacitance can be
(A) 0.001 μF
(B) 0.005 μF
(C) 0.01 μF
(D) 0.05 μF
(E) 0.1 μF (multiple choice)

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