BEE Cheat Sheet 2026

The 30 highest-yield BEE facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which system from the list below is described by partial differential functions? → Distributed parameter systems and Dynamic systems
2. A discrete-time system is stable if all poles of its transfer function H(z) lie: → Inside the unit circle
3. In the context of nodal analysis, what is a 'supernode' used for? → To handle a voltage source connected between two non-reference nodes.
4. For a second-order underdamped system, which parameter directly determines the frequency of oscillation in the transient response? → Damped natural frequency
5. In a purely resistive AC circuit, what is the phase angle between voltage and current? → 0 degrees
6. In a Bode plot, a first-order pole contributes what slope change at its corner frequency? → -20 dB/decade
7. Speed control of a DC shunt motor can be achieved by: → Both armature resistance variation and field current variation
8. What does a phase margin of 0 degrees indicate about a feedback control system? → The system is on the verge of instability
9. Who developed an approach to measure current and defined electric current? → Andre-Marie Ampere
10. Which of the following input-output relationships, y(t), describes a system that is linear but NOT time-invariant? → y(t) = x(t) * cos(2πt)
11. A 10 Ω resistor and a 20 Ω resistor are connected in parallel across a 40 V DC source. What is the total current drawn from the source? → 6 A
12. Which of the following relationships is correct? → Tera>Giga>Mega
13. A 10 V source is connected across two parallel resistors of 4 Ω and 12 Ω. What is the total current supplied by the source? → 3.33 A
14. Applying De Morgan's theorem to the Boolean expression (A + B)' ⋅ C simplifies to which of the following expressions? → A' ⋅ B' ⋅ C
15. What determines the built-in potential of a p-n junction at thermal equilibrium? → Doping concentrations on both sides
16. What is the transfer function of a PID controller in the Laplace domain? → Kp + Ki/s + Kd·s
17. In the context of a system's transfer function in the s-plane, what is the primary significance of a pole's location? → It dictates the system's stability and transient response characteristics.
18. Which gates in digital circuits are necessary to transform a NOR-based SR latch into an SR flip-flop? → Two 2 input AND gates
19. A DC circuit has three resistors of 4 Ω, 6 Ω, and 12 Ω connected in parallel. What is the equivalent resistance? → 2 Ω
20. What is the dominant effect of Miller capacitance in a common-emitter amplifier? → It reduces the high-frequency bandwidth
21. An illustration of a discrete collection of data or system is → data on a CD
22. What is dependent sources' alternate name? → Controlled sources
23. A 5 cm radius circular loop carries 2 A of current. What is the approximate magnetic dipole moment magnitude? → 15.7 × 10⁻³ A·m²
24. A three-phase synchronous generator (alternator) operates at 3000 RPM and produces 50 Hz output. The number of poles it has is: → 2
25. In a three-phase power system, what happens to the line voltage relative to the phase voltage in a delta-connected generator? → Line voltage equals phase voltage
26. The method of ________ yields an unknown capacitance value. → comparison with standard
27. The power factor of a purely resistive circuit is: → 1
28. What condition must the eigenvalues of the state matrix A satisfy for an LTI system to be asymptotically stable? → All eigenvalues must have negative real parts
29. What is the cause of the current's flow? → Electrons
30. A linearly polarized wave has its electric field oriented in the x-direction and propagates in the z-direction. What is the orientation of the magnetic field? → y-direction