3. Assume that the switch has been in position 1 for a long time. At time = 0 the switch is moved to position 2. Calculate the v (t) and i(1) for t> 0. 6KN ic 100μ F 12V Vc 3KN

1-What phrase is used when a substitution is permitted for a specific item? 2-The specifications state that all work shall be done... 3-What phrase is used when a substitution is permitted for a specific item? 4-What is the purpose of an electrical symbol? 5. Where are notations found?

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Assume that the counter shown below is currently holding the value 1000. Keno Kleno RBI 7446 After 36 clock pulses, what value will you see on the 7-segment display?

13. Convert the following digital number to decimal form: a) 100111 b) 11010100 * Your answer

Q 3

A 1000-VA, 230/115-V transformer has been tested to determine its equivalent cir- cuit. The results of the tests are shown below. Open-circuit test (on secondary side) Short-circuit test (on primary side) Voc = 115 V Vsc = 17.1 V %3D %3D Isc 8.7 A Psc loc =0.11 A Poc = 3.9 W = 38.1 W (a) Find the equivalent circuit of this transformer referred to the low-voltage side of the transformer. (b) Find the transformer's voltage regulation at rated conditions and (1) 0.8 PF lag- ging, (2) 1.0 PF, (3) 0.8 PF leading. (c) Determine the transformer's efficiency at rated conditions and 0.8 PF lagging.

• 6.12 Write a behavioral-style Verilog module Vr2to4decp_b for the 2- to-4 binary decoder with polarity control shown in Eigure 6-3. Use a vector I[1:0] for the select inputs, and a vector Y[0:3] for the outputs. Be sure that your code does not create an “inferred latch."