Questions and Answers IECEP 5th Calabarzon Bit Bit the BEES

Round 1 1. Perpendicular Perpendicular distance distance from the center center of a regular regular polygon polygons. s. Ans: Apothem 2. Term perta pertains ins the the positio position n of a satelli satellite. te. Ans: Ephemeris* 3. FCC assigned assigned channel channel bandwidth bandwidth for FM FM Broadcast. Broadcast. Ans: 200-kHz 4. Average value of of a half-wave half-wave rectified rectified voltage of 200-V 200-V Vp. Ans: 63.662-V 5. Ideal DC DC out voltage voltage of a capacito capacitorr input filter or or equal to. Ans: Peak value of the rectified voltage 6. Minimum energy of of valence valence electron electron must gain gain in order to break the covalent covalent bond. Ans: Bandgap Energy or Energy gap

Round 2 1. If A(1, A(1, 3 ,5) ,5) & B(2,4,6) B(2,4,6) Find the the intersection intersection of A & B. Ans: {null} or 0 2. Who is the British British Mathematic Mathematician ian who who discovered discovered matrices matrices in the the year 1858? 1858? Ans: Arthur Cayley 3. The function (1 + sec θ)(1 – cos θ) is equal to ________ ________ in its simplest simplest form. Ans: tanθsinθ 4. Find the eccentr eccentrici icity ty if (x2/25) + (y 2/16) = 1. Ans: 3/5 or 0.6 5. If the amplitude amplitude of a system system moving moving in simple simple motion motion as doubled, doubled, which of of the following quantities does not change? a. Period

b. Total energy c. Maximum speed d. Maximum acceleration Ans: period* 6. In an optical fiber, the geometrical path which pass through the axis of  symmetry and obey the self-interference condition is known as________. Ans. Meridional ray 7. The ability of material that permits it to be permanent bent or twisted into various shapes without breaking . Ans: Ductility

Round 3 1. Find the area of the triangle whose vertices are (-2,-4), (1,6) & (5,2). Ans: 26 sq. units* 2. What is the gain or loss in dB when a V2 of 15-mV across 75Ω drops to 3-mV for V1 across 300Ω? Ans: -20 dB or 20 dB loss 3. Calculate the total transmitted power of an AM transmitter with a 10kW carries which transmits 11.2kW when modulated at 50% with another sine wave. Ans: 12.45kW 4. 20 cm3 of a monoatomic gas at 12°C and 100kPa is suddenly and adiabiatically compressed to 0.5 cm 3 the new pressures is____? Ans: 46.78MPa 5. The first byte in a machine level instruction is called______.

Ans: Operation code 6. Suppose that $1,000 is to be received after 5yrs. At an annual interest rate of  12%.What is the present worth of this amount? Ans: $567.43* 7. An energy source forces a constant current of 2A for 10 seconds to flow through a light bulb. If 2.3kJ is given off, in the form of light and heat energy calculate the voltage drop across the bulb. Ans: 115-V*