Go To Top Reset
<<= Back
Next =>>
You Are On Multi Choice Question Bank SET 1327
66351. The electrical energy consumed by a coil is stored in the form of:
(A): an electrical field (B): a force field (C): an electrostatic field (D): a magnetic field
66352. What is magnetic flux?
(A): the number of lines of force in webers (B): the number of lines of force in maxwells (C): the number of lines of force in teslas (D): the number of lines of force in flux density
66353. As current travels within a conductor:
(A): the magnetic field aids the current (B): a magnetic field is developed around it (C): the wire tries to point north (D): an electrostatic field opposes the current
66354. What type of device consists of a coil with a moveable iron core?
(A): solenoid (B): reed switch (C): relay (D): armature
66355. What is hysteresis?
(A): lead between cause and effect (B): lag between cause and effect (C): lead between voltage and current (D): lag between voltage and current
66356. One of DeMorgan's theorems states that . Simply stated, this means that logically there is no difference between:
(A): a NAND gate and an AND gate with a bubbled output (B): a NOR gate and an AND gate with a bubbled output (C): a NOR gate and a NAND gate with a bubbled output (D): a NAND gate and an OR gate with a bubbled output
66357. Subtraction is commutative.
(A): True (B): False
66358. The Boolean expression for a three-input AND gate is Y = A • B + C.
(A): True (B): False
66359. According to the commutative law, in ORing and ANDing of two variables, the order in which the variables are ORed or ANDed makes no difference.
(A): True (B): False
66360. is the algebraic expression for the duality theorem.
(A): True (B): False
66361. The associative law of addition states that A + (B + C) = (A + B) + C.
(A): True (B): False
66362. The sum-of-products form is a Boolean expression that describes the ANDing of two or more OR functions.
(A): True (B): False
66363. The double-inversion rule states that if a variable is inverted twice, then the variable will be back to its original state.
(A): True (B): False
66364. Each "1" entry in a K-map square represents ______________.
(A): a HIGH output on the truth table for all input combinations (B): a LOW output for all possible HIGH input conditions (C): a HIGH for each input truth table condition that produces a HIGH output
66365. One reason for using the sum-of-products form is that it can be implemented using all ______ gates without much alteration.
(A): AND (B): NAND (C): OR (D): NOR
66366. The application of Boolean algebra to the solution of digital logic circuits was first explored by ________ of ________.
(A): Claude Shannon, MIT (B): George Boole, MIT (C): George Boole, Stanford (D): Claude Shannon, IBM
66367. A Karnaugh map will ____________________.
(A): eliminate the need for tedious Boolean expressions (B): allow any circuit to be implemented with just AND and OR gates (C): produce the simplest sum-of-products expression (D): give an overall picture of how the signals flow through the logic circuit
66368. The observation that a bubbled input OR gate is interchangeable with a bubbled output AND gate is referred to as:
(A): a Karnaugh map (B): the commutative law of addition (C): the associative law of multiplication
66369. Exclusive-OR (XOR) logic gates can be constructed from what other logic gates?
(A): OR gates only (B): AND gates and NOT gates (C): AND gates, OR gates, and NOT gates (D): OR gates and NOT gates
66370. What input values will cause an AND logic gate to produce a HIGH output?
(A): At least one input is HIGH. (B): At least one input is LOW. (C): All inputs are HIGH. (D): All inputs are LOW.
66371. The output of an exclusive-OR (XOR) gate is 1 only when the inputs are different.
(A): True (B): False
66372. If the output of a gate is OFF when the inputs are the same, and ON when they are different, the gate must be an exclusive-OR.
(A): True (B): False
66373. The output of a NAND gate is the same as the inverted output of an AND gate.
(A): True (B): False
66374. Logic gate circuits contain predictable gate functions that open their outputs.
(A): True (B): False
66375. If both inputs are required to be ON for the output to be ON, the gate must be an AND gate.
(A): True (B): False
66376. The exclusive-NOR (XNOR) gate is simply an OR gate followed by a NOT gate.
(A): True (B): False
66377. A logic circuit whose output is LOW when at least one input is HIGH is a(n) _________ gate.
(A): NOR (B): AND (C): NAND (D): exclusive-OR gate
66378. The AND function can be used to ___________ and the OR function can be used to _____________.
(A): enable, disable (B): disable, enable (C): synchronize, energize (D): detect, invert
66379. The dependency notation " 1" inside a block stands for the ________ operation.
(A): OR (B): XOR (C): AND (D): XNOR
66380. If we use an AND gate to inhibit a signal from passing, one of the inputs must be _________.
(A): LOW (B): HIGH (C): inverted (D): floating
66381. The output will be a LOW for any case when one or more inputs are zero in a(n):
(A): OR gate (B): NOT gate (C): AND gate (D): NAND gate
66382. A single transistor can be used to build which of the following digital logic gates?
(A): AND gates (B): OR gates (C): NOT gates (D): NAND gates
66383. How many NAND circuits are contained in a 7400 NAND IC?
(A): 1 (B): 2 (C): 4 (D): 8
66384. The Hall effect
(A): is a phenomenon with no practical applications (B): is used in various sensor applications (C): can develop potentials of thousands of volts (D): is the basis for solar cell operation
66385. "Series" and "parallel" as applied to dc motors refer to
(A): the connection of the motor and controller (B): the connection of the field coil and armature windings (C): the connection of the brush and commutator (D): the connection of the motor batteries
66386. The component that produces power in an electromagnetic generator is called the
(A): armature (B): field winding (C): commutator (D): brush
66387. What is the magnetomotive force in a 150-turn coil of wire with 2 A flowing through it?
(A): 13.33 mAt (B): 300 At (C): 75 At (D): 152 At
66388. A Hall effect sensor
(A): exists only in theory (B): is a noncontacting magnetic sensor (C): can operate only a few times before failure (D): produces very large voltages
66389. Which electromagnetic device has a flexible cone?
(A): A speaker (B): A dc generator (C): A relay (D): A solenoid
66390. What is the reluctance of a material that has a length of 0.045 m, a cross-sectional area of 0.015 m2, and a permeability of 2500 µWb/At·m?
(A): 833.33 µAt/Wb (B): 0.27 At/Wb (C): 1200 At/Wb (D): More information is needed in order to find the reluctance.
66391. The unit of flux density is known as
(A): magnetomotive force (B): a weber (C): a maxwell (D): a tesla
66392. What do you call the characteristic of a magnetic material whereby a change in magnetization lags the application of a magnetizing force?
(A): Hysteresis (B): Induction (C): Retentivity (D): Reluctance
66393. Which electromagnetic device has a movable iron core called a plunger?
(A): A speaker (B): A dc generator (C): A relay (D): A solenoid
66394. Which electromagnetic device contains an armature?
(A): A speaker (B): A dc generator (C): A relay (D): A solenoid
66395. The polarity of induced voltage while a field is collapsing is
(A): independent of the force creating the field (B): opposite to the force creating the field (C): identical to the force creating the field (D): present only if the force is stationary
66396. The unit of magnetic flux density is the weber.
(A): True (B): False
66397. The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called retentivity.
(A): True (B): False
<<= Back
Next =>>
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use
Powered By:Omega Web SolutionsPrivacy | Terms And Conditions
Powered By:Omega Web Solutions