Distance Learning Review

With 3 bits we can represent the values from _____ to ________.

0,7

The multiplier 10^-4 is equal to:

0.0001

Convert 3.74 x 10^-2 into ordinary notation form.

0.0374

Multiply 1.5 x 10^12 by 4.0 x 10^-5.

6.0 x 10^7

What is the largest number that can be represented with one digit in the octal system?

7

Convert 12,470 V to kV.

12.47 kV

Convert 1110(base of 2) to decimal.

14

Convert binary 100011101 to decimal.

285

Convert 325 ns(nanoseconds) to s(seconds).

325 x 10^-9 s

Convert 111000111(base of 2) to decimal.

455

Convert 0.046 mW to nW.

46,000.0 nW

How much energy do five light bulbs with a power of 60W each consume in three hours?

900W

Divide 14.0 x 10^7 by 2.0 x 10^9.

7.0 x 10^-2

How many bits are in one byte?

8

How many numbers can be represented with 3 bits?

8

Subtract 3.61 x 10^6 from 8.973 x 10^7.

8.612 x 10^7

When the voltage leads the current, an AC circuit is said to be _________.

An inductive circuit

What is the numbering system that is based on the digits "0" and "1"?

Binary

A transistor in active mode is used as _________.

An amplifier.

What is the numbering system that includes the letters from "A" to "F" in the basic symbols?

Hexadecimal

Respectively, the positive and negative elements that contribute to current flow in a conductor are:

Holes and Electrons

Ohm's Law States

I = ExR

The current gain of an amplifier is:

I OUT/I In

What is the term used to describe the total opposition to current flow within a circuit, and applies to both AC and DC circuits?

Impedance

Materials with 1, 2, or 3 valence electrons are good ___________.

Conductors

(T/F) In the circuit below the power supplied by the voltage source is different from the sum of the powers dissipated by the resistors.

False

(T/F) Like magnetic poles attract each other; unlike poles repel each other.

False

(T/F) The formulas: V= IxR and E= IxR have a complete different meaning because E stands for Electricity, whereas V is voltage.

False

(T/F) The resistivity of a conductor material is greater than that of an insulator.

False

In a capacitor:

The current leads the voltage by 90(degrees)

The time it takes to complete one cycle for a sine wave is called:

The period

What is the value of the impedance when there is only a DC voltage source in the circuit?

It is equal to the total resistance of the circuit.

The exponent 10^-6 corresponds to the prefix ________________.

Micro

Inductive Reactance, Capacitive Reactance, and Impedance are measured in:

Ohms

Resistance is measured in units of:

Ohms

When two sine waves representing voltage and current signals are shown on the same graph, and the maximum voltage amplitude occurs at a different time than the maximum current amplitude, the two waves are said to be:

Out of Phase with each other

An alternative formula for calculating the equivalent resistance of only two resistors connected in parallel is:

R1 R2/R1 + R2

What is the term for the ability of an object to oppose the current flow?

Resistance

AWG 15 is _________ than AWG 12.

Smaller

The potential difference between two points in a circuit is also referred to as:

Voltage

Convert 15,000,000 W into proper scientific notation and using the most appropriate prefix.

1.5 x 10^7 W and 15 MW

In binary, continue the following numbering sequence: 100,101,110,111

1000,1001,1010,1011,1100

Convert decimal 10 to binary.

1010

Which of the following multipliers is represented by the Greek Prefix milli?

10^-3

Which of the following multipliers is represented by the Greek Prefix Mega?

10^6

Convert the decimal fraction 0.0024 into proper scientific notation.

2.4 x 10^-3

What is NOT a characteristic of a series circuit: A) The sum of individual voltage drops across each resistor equals the voltage source. B) The total resistance is always smaller than the smallest resistance in series. C) The current stays the same throughout the entire circuit. D) The sum of the power dissipated by each resistor equals the power supplied by the voltage.

(Letter B) The total resistance is always smaller than the smallest resistance in series.

Add 2.42 x 10^3 to 1.07 x 10^4.

1.312 x 10^4

What is the frequency of a voltage sine wave with a period of 1 ms?

1,000 Hz

What does Giga represent?

1,000,000,000

What does nano represent?

1.0 x 10^-9

Multiply 9.6 x 10^4 by 2.0 x 10^5.

1.92 x 10^10

The multiplier 10^4 is equal to:

10,000

In octal, continue the following numbering sequence: 0,1,2,3,4,5,6,7,

10,11,12,13,14,15

Convert 2.6 x 10^6 into ordinary notation form.

2,600,000

Convert the number 23,800 into proper scientific notation.

2.38 x 10^4

How many combinations are available with 2 symbols in the hexadecimal system?

256

Convert binary 101111010 to decimal.

378

What is the RMS value of a 538V peak AC voltage?

380V

Convert 0.00452V to mV.

4.52 mV

Find the equivalent resistance of an 8(Ohms "Symbol") resistor in parallel with a 12(Ohms "Symbol") resistor.

4.8(Ohms "Symbol")

Electrostatic Discharge(ESD) is __________.

A release of static electricity that can damage electronic circuits.

A transistor swinging between cut-off and saturation regions is used as ____________.

A switch.

Faraday's Law states:

A voltage is produced in any conductor in a changing magnetic field.

Power is: A) P=VxI B) P=E^2/R C) P= I^2 R D) All of the above

All of the above

The inductance value increases by: A)Decreasing the space between turns B) Increasing the sectional area of the core C) Increasing the number of turns D) All of the above

All of the above

An advantage of IC circuits compared to discrete circuits is A) Lower cost B) Lower consumption C) Higher speed D) All of the above

All of the above.

Which of the following statements is TRUE for the binary system? A) It uses two symbols to represent any number B) The wighting factor for each position is a power of 2. C) The exponent of the weighting factor for the right-most position is 0. D) All of the above.

All of the above.

A flow of charges (electrons and holes) that periodically reverse their direction is called:

Alternating Current

The AC current generator is called:

Alternator

When a junction diode is forward biased, the current flows from:

Anode to Cathode

What is the term for the ability to store electric charges between conductors separated by a dielectric?

Capacitance

Step-down transformers are used to:

Convert high AC voltage and low AC current to low AC voltage and high AC current.

A rectifier:

Converts AC voltage and current into pulsating DC voltage and current.

Batteries are chemical devices that produce ________ voltage.

DC

In the US wire gauge standard, the gauge represents the ______ of the wire.

Diameter

A semiconductor device that allows electrical current to flow in one direction, but not in the other direction is called:

Diode

A flow of charges (electrons and holes) always in the same direction (i.e.: the electrons always flowing in one direction, and the holes always flowing in one direction) is called:

Direct Current

The process of adding impurity atoms to pure (intrinsic) semiconductor materials in order to improve the conductivity is called:

Doping

The capacitance increases by:

Increasing the size of the metal plates.

What is the term for the inability of an inductor to resist any change in current flow?

Inductance

Which of the following components resists changes in current flow?

Inductor

Materials with 8 valence electrons are good _______.

Insulators.

The exponent 10^3 corresponds to the prefix _______________.

Kilo

The Statement: "In a series circuit, the sum of the voltage drops across the resistors equals the voltage source" is referred to as:

Kirchhoff's Voltage Law

A semiconductor device that emits light when forward biased is called:

Light Emitting Diode

A resistor:

Limits the flow of current in an electrical circuit.

What is the term describing the relative distance between two points of a sine wave within a period?

Phase

The standard convention for the positive current flow is the same as hole flow, which travel from the _________ to the ________.

Positive pole of the battery, negative pole of the battery.

The most common semiconductor materials used to manufacture solid state diodes and transistors are:

Silicon and Germanium

For a sine wave voltage curve, the distance from the zero line to the maximum positive or negative amplitude of the wave is called:

The Peak voltage

For a sine wave voltage curve, the distance from the maximum positive amplitude to the maximum negative amplitude of the wave is called:

The Peak-to-Peak voltage

The number of times a waveform repeats itself during a 1-second interval is called:

The frequency of the wave

(T/F) A capacitor opposes rapid changes of voltage in a circuit.

True

(T/F) An integrated circuit (IC) is made of discrete components connected to one another.

True

(T/F) In a parallel circuit there are many paths for the current flow.

True

(T/F) In reverse bias a diode acts as an open circuit.

True

(T/F) The equivalent resistance of a number of resistors connected in parallel is always smaller than the value of the smallest resistor of the parallel connection.

True

The unit of measurement for voltage and current are, respectively:

Volts and Amps

A semiconductor device used to stabilize the voltage across a load when it is reverse biased is called _______________.

Zener Diode