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2 Suppose a coil of 250 H and capacitor of 100 pF are connected in series The frequency is 500 MHz What is the complex impedance (a) 0 + j467 (b) 25 + j100 (c) 0 j467 (d) 25 j100 3 When R = 0 in a series RLC circuit, but the net reactance is not zero, the impedance vector (a) always points straight up (b) always points straight down (c) always points straight toward the right (d) None of the above is correct 4 Suppose a resistor of 150 , a coil with a reactance of 100 , and a capacitor with a reactance of 200 are connected in series What is the complex impedance (a) 150 + j100 (b) 150 j200 (c) 100 j200 (d) 150 j100 5 Suppose a resistor of 330 , a coil of 100 H, and a capacitor of 200 pF are in series What is the complex impedance at 100 MHz (a) 330 j199 (b) 300 + j201 (c) 300 + j142 (d) 330 j168 6 Suppose a coil has an inductance of 300 H and a resistance of 100 in its winding A capacitor of 100 pF is in series with this coil What is the complex impedance at 100 MHz (a) 10 + j300 (b) 10 + j292 (c) 10 j97 (d) 10 + j348 7 Suppose a coil has a reactance of 400 What is the complex admittance, assuming there is nothing else is in the circuit (a) 0 + j025 (b) 0 + j400 (c) 0 j025 (d) 0 j400 8 What will happen to the susceptance of a capacitor if the frequency is doubled and all other factors remain constant (a) It will decrease to half its former value (b) It will not change

Figure 14-4

requires deleting existing index metadata from the sys.sysindexes system view prior to re-creating indexes (step 3 in the previous list). This fact might discourage some from using this technique, but it should be pointed out that updating this system view does not, in and of itself, compromise the integrity of the database, as the database tables that contain the real data in our database are stored within the PRIMARY filegroup and are not affected by the update of this system view.

If checking reveals the selection to be of the wrong type, you can tell the user which type of selection is needed

Microsoft. An alternative supported solution is to reconstruct the database by scripting its definition, re-creating the database, exporting all table data from the backup, and re-importing to the new re-created database. This system update is required because neither DROP INDEX nor CREATE INDEX WITH DROP_EXISTING work when only the PRIMARY filegroup has been restored. Each fails with an error stating that the index s filegroup is offline as SQL Server attempts to remove the index s allocations, which aren t available during execution of the command. To avoid this system catalog update, an alternative is to re-create an entirely new database by scripting all database objects from the PRIMARY filegroup (tables, indexes, and all other objects) and exporting all data from the restored PRIMARY filegroup into that new database. This is obviously more time-consuming than only recreating nonclustered indexes (as tables are also re-created in the new database), but it s a workable alternative that allows you to bring a database back online from PRIMARY filegroup backup without using any system catalog updates.

(c) It will double (d) It will quadruple 9 Suppose a coil and capacitor are in parallel, with jBL = j005 and jBC = j003 What is the complex admittance, assuming that nothing is in series or parallel with these components (a) 0 j002 (b) 0 j007 (c) 0 + j002 (d) 005 + j003 10 Imagine a coil, a resistor, and a capacitor connected in parallel The resistance is 10 , the capacitive susceptance is 10 S, and the inductive susceptance is 10 S Then, suddenly, the frequency is cut to half its former value What is the complex admittance at the new frequency (a) 10 + j00 (b) 10 + j15 (c) 10 j15 (d) 10 j20 11 Suppose a coil of 350 H and a capacitor of 470 pF are in parallel The frequency is 955 MHz There is nothing else in series or parallel with these components What is the complex admittance (a) 0 + j000282 (b) 0 j000194 (c) 0 + j000194 (d) 0 j000758 12 A vector pointing southeast in the GB plane would indicate (a) pure conductance with zero susceptance (b) conductance and inductive susceptance (c) conductance and capacitive susceptance (d) pure susceptance with zero conductance 13 Suppose a resistor with conductance 00044 S, a capacitor with susceptance 0035 S, and a coil with susceptance 0011 S are all connected in parallel What is the complex admittance (a) 00044 + j 0024 (b) 0035 j0011 (c) 0011 + j0035 (d) 00044 + j0046 14 Suppose a resistor of 100 , a coil of 450 H, and a capacitor of 220 pF are in parallel What is the complex admittance at a frequency of 650 MHz (a) 100 + j000354 (b) 0010 + j000354 (c) 100 j00144 (d) 0010 + j00144