Electronic Test 7 Volume 1

1. What is the medium of communication with a computer where programs are whitten in mnemonics?
A. High level language
(B). Assembly language
C. Machine language
D. Low-level language
2. The arrow in the symbol of a transistor indicates the direction of
A. electron current in the collector
B. electron current in the emitter
C. donor ion current
(D) hole current in the emitter
3. What is the total resistance of two equal valued resistors in series?
(A) Twice as one
B. The sum of their reciprocals
C. The difference of both
D. The product of both
4.What is the time interval to undertake a refresh operation in typical dynamic RAM?
(A) 200 ns
B. 2 ns
C. 50µs
D. 22µs
5. Electric energy refers to
A. joules divdded by time
(B) volt coulomb
C. volt ampere
D. watt
6. The ideal internal resistance of an ammeter should be
A. equal to the circuit resistance
B. infinity
(C) zero
D. higher than the circuits impedance
7. What type of bias is required for an LED to produce luminescence?
A. Reverse bias
B. Zero bias
(C) Forward bias
D. inductive bias
8. ----------is a layer of an insulating medium that separates plates of a capacitor.
A. Insulation
B. Core
(C) Dielectric
D. Space
9. What is a local oscillator of a radar receiver?
A. Detector
B. Product detector
C. Hartly oscillator
(D) Klystron oscillator
10. What is the equivalent of decimal number 11 in binary
A. 1101
B. 1110
C. 1111
(D) 1011
11. In the concept of induction heating in industrial electronics, the eddy current penetrates to greater depths at
A. high frequencies
(B) increasing induction
C. decreasing induction
D. low frequencies
12. Type of power-line frequency meter composed of vibrating iron reeds placed in alternating magnetic field.
A. Induction type
B. Resonant type
(C) Vibrating reed type
D. Electrodynamic type
13. ____ is called the time sharing of one line with multiplex signal
A. Simultaneous transmission
B. Relay
C. Bi-Directional
(D). Multiplexing
14. A process of constant loss of free electrons and then regaining is called
A. induction
(B) ionization
C. polarization
D. electron gaining
15. The octal equivalent of binary number 10101100 is
A. 367
B. AC16
(C) 254
D. 172
16. Which type of network offers the greater transformation ratio?
A. L-network
(B) Pi-network
C. Constant
D. Constant- M
17 The density of data recorded on magnetic tape is measured in
A. bit stuffing rate
B. bit error
(C) bits per inch
D. bits per second
18. In electricity, positive electric charge refers to
(A) protons
B. neutrons
C. electrons
D. atoms
19 What is the lagging effect between the magnetizing force applied and flux density?
A. Hysteresis
(B) Permeance
C. Eddy current
D. Reluctance
20. What is the equivalent of decimal 15 in octal?
A. 15
B. 18
(C) 17
D. 16
21. How many diodes will you use to have a basic half-wave rectifier?
A. Three
B. Four
(C) Two
D. One
22. Choose the correct answer.
A. A nibble is 4 bits.
B. A byte is 8 bits
C. A bit is one binary digit.
(D) All answers are correct.
23. Component of solar battery which uses light energy to produce electromagnetic force.
A. Alkaline cells
B. Polymer cells
C. Lithuim cells
(D) Selenium cells
24. Kind of AC motor light load high speed or high load speed.
A. Synchronous motor
B. Squirrel-cage motor
C. Split phase motor
(D). Universal motor
25. The most common acid used in lead-acid batteries is
A. nitric acid
B. muric acid
(C) sulfuric acid
D. phosphoric acid
26.What is the smallest element of a matter?
A. Neutron
B. Proton
(C) Atom
D. Electron
27.The ability of a material to conduct magnetic flux through it refers to
A. Permittivity
(B) Permeability
C. Reluctivity
D. Conductivity
28. Part of the oscilloscope which produces bright spot through collection of electrons.
A. Magnetic type
B. Heater cathode
(C) Aquadag coating
D. Grid
29. __________refers to the class of logic circuit containing flip-flops
(A) Combinational
B. Sequential
C. Linear
D. feedback
30. A measuring device of meter made,so the pointer rests at the center of its scale at zero current.
A. linear meter
(B) Galvanometer
C. Digital meter
D. Non-linear meter