61. DIODE are_______
- a) TWO type
- b) THREE type
- c) FOUR type
- d) FIVE type
Answer: B - Diodes are of THREE main types: Standard (PN junction), Zener, and Schottky diodes.
62. A data conversion system may be used to interface a digital computer system to _________.
- a) An analog output device
- b) A digital output device
- c) An analog input device
- d) A digital printer
Answer: A - A data conversion system (DAC) interfaces a digital computer to an analog output device like speakers or analog meters.
63. 223 on a capacitor represents_______
- a) 0.022u
- b) 22n
- c) 22,000 p
- d) All of the above
Answer: D - 223 on capacitor = 22 × 10³ pF = 22,000pF = 22nF = 0.022µF. All options are correct.
64. PNP and NPN transistors are same in terms of working.
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: B - FALSE. PNP and NPN transistors work oppositely; they have different polarity requirements for biasing.
65. The voltages in digital electronics are continuously variable.
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: B - FALSE. Digital electronics use discrete voltage levels (0 and 1), not continuously variable (that's analog).
66. capacitor is a_______
- a) Loss electrical energy
- b) Store electrical energy
- c) Both
- d) None of this
Answer: B - A capacitor stores electrical energy in an electrostatic field between its plates.
67. LED light works Forward bias.
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: A - TRUE. LED (Light Emitting Diode) emits light only when forward biased (anode positive, cathode negative).
68. Transistor amplify the signal.
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: A - TRUE. Transistors can amplify weak signals by using a small input to control a larger output.
69. Electrolytic capacitor used in_______
- a) AC Supply
- b) DC Supply
- c) Both
- d) None of this
Answer: B - Electrolytic capacitors are polarized and used only with DC supply. Reverse polarity can damage them.
70. In case of Short Circuit, ________ Current will flow in the Circuit.
- a) Zero
- b) Very Low
- c) Normal
- d) Infinite
Answer: D - In a short circuit, theoretically infinite current flows as resistance approaches zero (I = V/R).
71. Full form of A.C. is_______
- a) Air Conditioner
- b) Air Conduct
- c) Alternative Current
- d) None of this
Answer: C - A.C. stands for Alternating Current (not Alternative Current), which changes direction periodically.
72. Electrolytic condenser works only in_______
- a) AC supply
- b) DC supply
- c) AC DC both supply
- d) N.A.
Answer: B - Electrolytic capacitors (condensers) are polarized and work only with DC supply.
73. An IC regulator receives an overload; it will:
- a) Shut down
- b) Compensate for heat
- c) Provide more voltage
- d) Sample and adjust
Answer: A - An IC regulator will shut down (overload protection) when it receives an overload condition to prevent damage.
74. Capacitor unit is_______
- a) FARAD
- b) OHM
- c) JUL
- d) MICRO FARAD
Answer: D - The basic unit of capacitance is FARAD, but MICRO FARAD (µF) is more commonly used in electronics.
75. IC stands for_______
- a) Information Center
- b) Iron Coil
- c) Integrated Circuit
- d) None of this
Answer: C - IC stands for Integrated Circuit, a miniaturized electronic circuit consisting of semiconductor devices.
76. 2.2 k resistance colour code is_______
- a) Red Red Orange
- b) Red Red Red
- c) Red Red Yellow
- d) Red Red Black
Answer: B - 2.2kΩ = 2200Ω. Color code: Red(2), Red(2), Red(×100) = 22 × 100 = 2200Ω.
77. If two resistor are placed in series, is the final resistance_______
- a) Higher
- b) Lower
- c) Same
- d) N.A.
Answer: A - In series, total resistance = R1 + R2, so final resistance is higher than individual resistors.
78. LED is_______
- a) CONDENSOR
- b) DIODE
- c) RESISTANCE
- d) COIL
Answer: B - LED (Light Emitting Diode) is a type of DIODE that emits light when forward biased.
79. Brown Black Black Resistance colour code is_______
- a) 1000 Kilo ohm
- b) 100 ohm
- c) 10 ohm
- d) 100 Kilo ohm
Answer: C - Brown(1), Black(0), Black(×1) = 10 × 1 = 10Ω (Ten ohms).
80. Any number with an exponent of zero is equal to:
- a) Zero
- b) One
- c) That number
- d) Ten
Answer: B - Any number (except 0) raised to the power of zero equals 1 (e.g., 5^0 = 1).