1. The voltage across two resistors are equal when they are connected in
A. series
(B) parallel
C.parallel-series
D. series-parallel
2. The currect is zero in all resistors connected in series when one resistor is
A. leaky
B. shorted
(C) opened
D. 0 Ω
3. The physical motion resulting from the forces of magnetic fields is called
(A) motor action
B. Faraday’s law
C. torque
D. Lenz’s law
4. The voltage output of a cell depends on its
A. size
B. construction
C. type
(D) elements
5. What is the most common type of dry cell?
A. Leclanche’s cell
B. Carbon-zinc
C. Lithium cell
(D) Both A and B
6. With the common collector amplifier,
A. the input impedance is low
B. the power gain is always less than 1
C. current gain is always less than 1
(D) voltage gain is always less than 1
7. Superconductivity occurs in certain substances
A. only when they are in liquid state
(B) only at very low temperatures
C. only at very high temperature
D. at all temperatures
8. Of the following quantities, the one that is vector in character is electric
A. energy
B. charge
(C) field
D. current
9. The elcectron in an atom
(A) are some distance away from the nucleus
B. are bound to its permanently
C. have more mass than the nucleus
D. may be positively or negatively charged
10. In a transistor oscillator, ______ is the active device.
A. biasing circuit
(B) transistor
C. LC tank circuit
D. PN junction
11. If the doping level is increased, the breakdown voltage of a zener
(A) is decreased
B. is increased
C. remains the same
D. becomes infinite
12. Which of the following statements is false?
(A) The proton and neutron have the same mass.
B. The electron and proton have different masses.
C. The electrons and protons have charges of the same magnitude but
opposite in sign.
D. Atomic nuclei contain only protons and neutrons.
13. Which of the following is neither a basic physical law or derivable
from one?
A. Coulomb’s law
(B) Ohm’s law
C. Kirchhoff’s first law
D. Kirchhoff’s second law
14. When a pure semiconductor is heated, its resistance
(A) goes down
B. goes up
C. remains the same
D. becomes zero
15. The gain of the amplifier with feedback is known as
A. open loop gain
(B) closed loop gain
C. feedback gain
D. regenerative gain
16. In an ac circuit, the voltage
A. leads the current
B. lags the current
C. is in phase with the current
(D) is any of the above
17. The power dissipated as heat in an ac circuit depends on
(A) resistance
B. inductive reactance
C. capacitive reactance
D. impedance
18. The emf produced in a wire by its motion across a magnetic field
Does not depend on
A. the length of the wire
(B) the diameter of the wire
C. the orientation of the wire
D. the flux density of the field
19. Eddy currents occur only in
A. ferromagnetic materials
(B) conductors
C. insulators
D. coils
20. Lenz’s law is a consequence of the la of conservation of
A. charge
B. field lines
C. momentum
(D) energy
21. All magnetic fields originate in
A. iron atoms
B. permanent magnets
C. magnetic domains
(D) moving electric charges
22. The resistance of a conductor does not depend on its
(A) mass
B. length
C. cross-section area
D. resistivity
23. The ripple will _______ if the filter capacitance is increased.
(A) decrease
B. stay the same
C. increase
D. become zero
24. Self-bias produces
(A) positive feedback
B. negative feedback
C. reverse feedback
D. forward feedback
25. The field effect transistor when compared to bipolar has
much more
A. current
B. voltage gain
(C) input resistance
D. supply voltage
26. Voltage gain is defined as the ratio of output voltage to
(A) input voltage
B. ac emitter resistance
C. ac collector resistance
C. generator voltage
27. What is the error voltage of an ideal op- amplifier?
A. Very small
B. Very large
(C) Zero
D. Equal to input voltage
28. What is the form of the schematic symbol an op-amplifier?
A. A square
B. A circle
(C) A triangle
D. A rectangle
29. Which resistor is good in radio amplifier application?
A. Silver mica
B. Wirewound
C. Tantalum
(D) Carton composition
30. Which does not denote a type a capacitor?
A. Silver-mica
B. Air variable
(C) Ferrite
D. Tantalum
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