Quiz in Basic Electronic Engineering | Exercises Physics

Physics 2

Assignment 2S

Multiple choice. Choose the correct answer with solutions and

prepare for an explanation/reason of your answer for an oral

exam next meeting.

1. Negative powers of 10

a. Indicate numbers less than 1

b. Are not used with engineering notation

c. Indicate numbers greater than 1

d. Are used only with scientific notation

2. 3.9 Mohms is the same as

a. 3.9x103 ohms

b. 3.9x106 ohms

c. 3900 kohms

d. Both b and c

3. A number written in standard form without any form

of powers of 10 notation is said to be written in

a. Scientific notation

b. Decimal notation

c. Engineering notation

d. Metric prefix notation

4. The coulomb is a unit of

a. Electric charge

b. Potential difference

c. Current

d. Voltage

5. In a metal conductor, such as copper wire,

a. Positive ions are the moving charges that

provide current

b. Free electrons are the moving charges that

provide current

c. There are no free electrons

d. None of the above

6. A semiconductor, such as silicon, has an electron

valence of

a. ±4

b. +1

c. -7

d. 0

7. Which of the following statements is true?

a. Current can exist without voltage

b. Voltage can exist without current

c. Current can flow through an open circuit

d. Both b and c

8. Conventional current is considered

a. The motion of negative charges in the

opposite direction of electron flow

b. The motion of positive charges in the same

direction as electron flow

c. The motion of positive charges in the

opposite direction of electron flow

d. None of the above

9. How much charge is accumulated in a dielectric that

is charged by a 4A current for 5 seconds?

a. 16 C

b. 20 C

c. 1.25 C

d. 0.8 C

10. A potentiometer is a

a. Three-terminal device used to vary the

voltage in a circuit

b. Two-terminal device used to vary the current

in a circuit

c. Fixed resistor

d. Two-terminal device used to vary the voltage

in a circuit

11. Which of the following resistors has the smallest

physical size?

a. Wire-wound

b. Carbon-composition

c. Surface-mount

d. Potentiometers

12. Reading from left to right, the colored bands on a

resistor are yellow, violet, brown, and gold. If the

resistor measures 513 ohms with an ohmmeter, it is

a. Well within tolerance

b. Out of tolerance

c. Right on the money

d. Close enough to be considered within

tolerance

13. How much will it cost to operate a 4 kW air

conditioner for 12 hours if the cost of electricity is

Php7/kwhr?

a. Php 336.00

b. Php 330.00

c. Php 824.00

d. Php 480.00

14. Which of the following voltage provides the greatest

danger in terms of electric shock?

a. 12 V

b. 10000 mV

c. 120 V

d. 9 V

15. On a schematic diagram, what does the chassis

ground symbol represent?

a. Hot spot on the chassis

b. The locations in the circuit where electrons

accumulate

c. A common return path for current in one or

more circuits

d. None of the above

16. Using electron flow, the polarity of a resistor’s voltage

drop is

a. Positive on the side where electrons enter

and negative on the side where they leave

b. Negative on the side where electrons enter

and positive on the side where they leave

c. Opposite to that obtained with conventional

current flow

d. Both b and c

Partial preview of the text

Download Quiz in Basic Electronic Engineering and more Exercises Physics in PDF only on Docsity!

Physics 2 Assignment 2S Multiple choice. Choose the correct answer with solutions and prepare for an explanation/reason of your answer for an oral exam next meeting.

Negative powers of 10 a. Indicate numbers less than 1 b. Are not used with engineering notation c. Indicate numbers greater than 1 d. Are used only with scientific notation
3.9 Mohms is the same as a. 3.9x10^3 ohms b. 3.9x10^6 ohms c. 3900 kohms d. Both b and c
A number written in standard form without any form of powers of 10 notation is said to be written in a. Scientific notation b. Decimal notation c. Engineering notation d. Metric prefix notation
The coulomb is a unit of a. Electric charge b. Potential difference c. Current d. Voltage
In a metal conductor, such as copper wire, a. Positive ions are the moving charges that provide current b. Free electrons are the moving charges that provide current c. There are no free electrons d. None of the above
A semiconductor, such as silicon, has an electron valence of a. ± b. + c. - 7 d. 0
Which of the following statements is true? a. Current can exist without voltage b. Voltage can exist without current c. Current can flow through an open circuit d. Both b and c
Conventional current is considered a. The motion of negative charges in the opposite direction of electron flow b. The motion of positive charges in the same direction as electron flow c. The motion of positive charges in the opposite direction of electron flow d. None of the above 9. How much charge is accumulated in a dielectric that is charged by a 4A current for 5 seconds? a. 16 C b. 20 C c. 1.25 C d. 0.8 C 10. A potentiometer is a a. Three-terminal device used to vary the voltage in a circuit b. Two-terminal device used to vary the current in a circuit c. Fixed resistor d. Two-terminal device used to vary the voltage in a circuit 11. Which of the following resistors has the smallest physical size? a. Wire-wound b. Carbon-composition c. Surface-mount d. Potentiometers 12. Reading from left to right, the colored bands on a resistor are yellow, violet, brown, and gold. If the resistor measures 513 ohms with an ohmmeter, it is a. Well within tolerance b. Out of tolerance c. Right on the money d. Close enough to be considered within tolerance 13. How much will it cost to operate a 4 kW air conditioner for 12 hours if the cost of electricity is Php7/kwhr? a. Php 336. b. Php 330. c. Php 824. d. Php 480. 14. Which of the following voltage provides the greatest danger in terms of electric shock? a. 12 V b. 10000 mV c. 120 V d. 9 V 15. On a schematic diagram, what does the chassis ground symbol represent? a. Hot spot on the chassis b. The locations in the circuit where electrons accumulate c. A common return path for current in one or more circuits d. None of the above 16. Using electron flow, the polarity of a resistor’s voltage drop is a. Positive on the side where electrons enter and negative on the side where they leave b. Negative on the side where electrons enter and positive on the side where they leave c. Opposite to that obtained with conventional current flow d. Both b and c

A positive electric pole: a. Has a deficiency of electrons. b. Have fewer electrons than the negative pole. c. Has an excess of electrons. d. Has more electrons than the negative pole
An EMF of one volt: a. Cannot drive much current through a circuit. b. Represents a low resistance. c. Can sometimes produce a large current. d. Drops to zero in a short time.
A potentially lethal electric current is on the order of: a. 0.01 mA. b. 0.1 mA. c. 1 mA. d. 0.1 A.
A current of 25 A is most likely drawn by: a. A flashlight bulb. b. A typical household. c. A power plant. d. A clock radio.
A piece of wire has a conductance of 20 Siemens. Its resistance is: a. 20 Ω b. 0.5 Ω. c. 0.05 Ω. d. 0.02 Ω.
A resistor has a value of 300 ohms. Its conductance is: a. 3.33 millisiemens b. 33.3 millisiemens c. 333 microsiemens d. 0.333 Siemens
A mile of wire has a conductance of 0.6 Siemens. Then three miles of the same wire has a conductance of: a. 1.8 Siemens b. 1.8 Ω c. 0.2 Siemens d. Not enough information has been given to answer this.
A 2-kW generator will deliver approximately how much current, reliably, at 117 V? a. 17 mA b. 234 mA c. 17 A d. 234 A
A circuit breaker is rated for 15 A at 117 V. This represents approximately how many kilowatts? a. 1. b. 1760 c. 7. d. 0.
You are told that a certain air conditioner is rated at 500 Btu. What is this in kWh? a. 147 b. 14. c. 1. d. 0. 27. Of the following energy units, the one most often used to define electrical energy is: a. The Btu b. The erg c. The foot pound d. The kilowatt hour 28. A low voltage, such as 12 V: a. Is never dangerous. b. Is always dangerous. c. Is dangerous if it is ac, but not if it is dc. d. Can be dangerous under certain conditions. 29. Which of these can represent magnetomotive force? a. The volt-turn b. The ampere-turn c. The gauss d. The gauss-turn 30. Which of the following units can represent magnetic flux density? a. The volt-turn b. The ampere-turn c. The gauss d. The gauss-turn 31. A ferromagnetic material: a. Concentrates magnetic flux lines within itself. b. Increases the total magnetomotive force around a current-carrying wire. c. Causes an increase in the current in a wire. d. Increases the number of ampere-turns in a wire. 32. A coil has 500 turns and carries 75 mA of current. The magnetomotive force will be: a. 37,500 At b. 375 At c. 37.5 At d. 3 .75 At 33. An alternating voltage is one that a. varies continuously in magnitude b. reverses periodically in polarity c. never varies in amplitude d. both a and b 34. One complete revolution of a conductor loop through a magnetic field is called a(n) a. octave b. decade c. cycle d. alternation 35. For a sine wave, one-half cycle is often called a(n) a. alternation b. harmonic c. octave d. period 36. One cycle includes a. 180 O b. 360 O c. 2π rad d. both b and c 37. In the Philippines, the frequency of the ac power-line voltage is a. 120 Hz b. 60 Hz c. 50 Hz d. 100 Hz

Quiz in Basic Electronic Engineering, Exercises of Physics

Related documents

Partial preview of the text

Download Quiz in Basic Electronic Engineering and more Exercises Physics in PDF only on Docsity!