AMIE Section B EEE Exam flashcards
AMIE Section B EEE Exam · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Thevenin equivalent circuit
- A linear network can be replaced by an open-circuit voltage source in series with a Thevenin resistance equal to the open-circuit voltage divided by the short-circuit current.
- Per-unit system
- A normalization method in which actual voltages, currents, and impedances are divided by chosen base values, simplifying transformer and power-system calculations across voltage levels.
- Induction motor slip
- The fractional difference between synchronous speed and rotor speed, s = (N_s − N_r)/N_s; rotor frequency equals slip times stator frequency.
- Symmetrical components
- A method that resolves an unbalanced three-phase set into positive, negative, and zero sequence sets, enabling fault-current calculation using sequence impedances.
- Transformer EMF equation
- The induced RMS voltage in a winding is E = 4.44·f·N·Φ_max, linking frequency, turns, and peak core flux for sinusoidal excitation.
- Maximum power transfer
- A source delivers maximum power to a resistive load when the load resistance equals the Thevenin resistance of the source, at an efficiency of 50 percent.
- MOSFET saturation condition
- An enhancement MOSFET operates in saturation when drain-source voltage is at least gate-source voltage minus threshold voltage, giving drain current proportional to the squared overdrive.
- Virtual short in op-amps
- With negative feedback and ideal op-amp assumptions, the inverting and non-inverting input voltages are forced nearly equal because infinite gain drives the differential input to zero.
- Nyquist sampling theorem
- A band-limited signal must be sampled at more than twice its highest frequency to allow perfect reconstruction; otherwise aliasing folds high frequencies into the baseband.
- Friis noise formula
- The total noise factor of cascaded stages equals the first stage factor plus each later stage factor minus one divided by the cumulative gain before it.
- Shannon capacity theorem
- The maximum error-free data rate over a band-limited channel with additive white Gaussian noise is bandwidth times the base-2 logarithm of one plus signal-to-noise ratio.
- Free-space path loss
- Received power in a line-of-sight radio link falls with the square of distance and frequency, giving 20 decibels of additional loss per decade of either.
- BJT saturation region
- A bipolar transistor is saturated when both base-emitter and base-collector junctions are forward biased, with collector-emitter voltage typically below 0.2 volts.
- Amdahl's law
- The speedup from improving a fraction p of a program by factor s is bounded by one divided by the sum of the unimproved fraction and p divided by s.
- Cache average access time
- The mean time to access memory equals cache hit time plus the miss rate multiplied by the miss penalty, including lower-level memory transfer time.
- Translation lookaside buffer
- A small associative cache of recent virtual-to-physical page translations; a TLB hit avoids a page-table walk and reduces effective memory access time.
- TCP congestion control
- TCP increases its congestion window slowly at first, doubles it each round trip until a threshold, then grows linearly and halves after packet loss.
- Third normal form
- A relation is in third normal form when it is in second normal form and every non-key attribute depends directly on the primary key, with no transitive dependencies.
- RISC architecture
- A processor design using fixed-length instructions, a load-store memory model, and many registers to simplify pipelining and reduce cycles per instruction.
- Binary search complexity
- Searching a sorted array by repeatedly halving the interval takes logarithmic time, requiring about log base two of n comparisons for n elements.
- Carnot efficiency
- The maximum thermal efficiency of any heat engine operating between two reservoirs equals one minus the ratio of absolute cold to hot temperatures.
- Otto cycle efficiency
- For an ideal air-standard Otto cycle, efficiency is one minus the inverse compression ratio raised to the specific-heat ratio minus one.
- Beam bending stress
- Normal stress in a bent beam equals bending moment times distance from the neutral axis divided by the second moment of area about that axis.
- Shaft torsional stress
- Maximum shear stress in a solid circular shaft is sixteen times torque divided by pi times diameter cubed, occurring at the outer surface.
- Steady-flow energy equation
- For steady flow through a control volume, heat added minus work done equals the change in enthalpy plus kinetic and potential energy per unit mass.
- Heat exchanger effectiveness
- The ratio of actual heat transfer to the thermodynamic maximum possible for given inlet temperatures and capacity rates, increasing with the number of transfer units.
- Bernoulli equation
- Along a streamline in steady, incompressible, frictionless flow, the sum of pressure head, velocity head, and elevation head remains constant.
- Water-cement ratio
- The mass of water divided by mass of cement in a concrete mix; lower ratios increase strength and durability but reduce workability unless admixtures are used.
- Terzaghi bearing capacity
- Ultimate soil bearing capacity for a shallow strip footing sums cohesion, surcharge, and unit-weight terms, each multiplied by a bearing-capacity factor.
- Effective stress principle
- Total vertical stress in saturated soil minus pore water pressure gives effective stress, which controls consolidation settlement and shear strength.
- Manning's equation
- Average open-channel velocity equals channel roughness reciprocal times hydraulic radius to the two-thirds power times bed slope to the one-half power.
- Balanced reinforced concrete section
- A beam cross-section in which tension steel reaches yield strain exactly as concrete reaches its ultimate compressive strain of about 0.003.