2.5 50 100 150 200 250 00 Time (s) Figure 3: Voltage versus time for a dischargi
ID: 2303593 • Letter: 2
Question
2.5 50 100 150 200 250 00 Time (s) Figure 3: Voltage versus time for a discharging capacitor. D What is the time constant of this RC-Circuit. a163 s b) 114 s c) 333 s d) 289 s I) What time will it take to discharge completely (Choose the best answer) a)289 s b) 300 s c) infinite d) 578 s 12. When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage a) Remains constant. b) Increases. c) Decreases. d) Reaches to zero. 13. A magnet is inserted into a coil of wire consisting of 500 loops. The cross-sectional area of the coil is 5x 10 m2 before inserting the magnet (initial time:to 0 minutes) the magnetic field at the location of the coil is Bo 4 T. After inserting the magnet (later time: t-1 minutes) into the coil the magnetic field has increased in the coil to B-10 T. Assume that the angle between surface normal of the coil and magnetic field is 450 at all times. D) Using Faraday's Law, determine the average induced voltage (emf) induced in the coil? a) 1.7TV b)1.5V c)106.06 V d) 0 l) If the time between which the change occur increases then induced voltage will, a) Increase b) Decrease c) Reverse d) remain the samoe.Explanation / Answer
1] time constant T = RC = time at which V becomes 0.368 times,
V = 3*0.368 = 1.104 V
From graph, the closest option, T = 114 s answer
II] infinite time will be taken to discharge completely.
12] increases, as rate of change of flux increases.
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