Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

EE > Basic Principles of Electricity > Flashcards

Basic Principles of Electricity Flashcards

1
Q

Weight of a Proton and a Neutron

A

1.672 x 10^-27 kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Formula for total valence electrons given an nth shell

A

N=2n^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is Atomic Number?

A

Number of protons in an atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Unit of Electric Charge

A

Coulumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

One coulomb equals how many electrons

A

6.25 x 10 ^18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Unit of potential difference

A

Volt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Equal to one joule of work done per one coulomb of charge

A

Volt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Happens when a potential difference between two charges forces a third charge to move

A

Current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Unit of flow of charge

A

Ampere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Equal to one coulomb of charge past a given point in one second

A

1 Ampere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Rate of absorbing or expending energy, measured in watts

A

Power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Capacity to do work, measured in joules

A

Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

1 watt-hour is equal to how many joules

A

3600 J

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Property of materials that opposes or resist the flow of electrons, unit in ohms

A

Resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Formula of resistance with respect to Length and Area of a conductor

A

R = (Rho x Length) / Area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Formula of resistance with respect to Volume and Area

A

R = (Rho x Volume) / Area^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Formula of resistance with respect to Length and Volume

A

R = (Rho x Length^2) / Volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Resistance by a Unit cube of the material. Normally measured at 20 degrees Celsius reference Temperature

A

Specific Resistance (Resistivity)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Area of a Circle with a diameter of 1 Mil

A

Circular Mil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

1 inch is equal to how many mils

A

1000 mils

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

1 sq. inch is equal to how many sq. mils?

A

10^6 sq. mils

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

1 sq. inch is equal to how many Circular Mils

A

4/pi x 10^6 CM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

As resistance increases, temperature _________?

A

Increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the specific resistance/resistivity of Hard-drawn Copper in Ohm-Meter at 20 degrees Celsius

A

1.77 x 10^-8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is the specific resistance of Hard-drawn copper in Ohm-CM per ft at 20 degrees C?

A

10.66

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What is the specific resistance/resistivity of Annealed Copper in Ohm-Meter at 20 degrees Celsius

A

1.72 x 10^-8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What is the specific resistance of Annealed copper in Ohm-CM per ft at 20 degrees C?

A

10.50

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What is the specific resistance/resistivity of Aluminum in Ohm-Meter at 20 degrees Celsius

A

2.83 x 10^-8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What is the specific resistance of Annealed copper in Ohm-CM per ft at 20 degrees C?

A

17.10

30
Q

What is the inferred absolute zero resistance temperature of a Hard-drawn Copper?

A
  • 242 degrees C
31
Q

What is the inferred absolute zero resistance temperature of a Annealed Copper?

A
  • 234.5 degrees C
32
Q

What is the inferred absolute zero resistance temperature of a Aluminum?

A
  • 236 degrees C
33
Q

In metric standard, as the number of gage increase, the wire size _____?

A

Increases

34
Q

What is the reciprocal of resistance?

A

Conductance

35
Q

Unit of conductance?

A

Siemens

36
Q

The current flowing in an electric circuit is directly proportional to the impressed emf applied to the circuit and inversely to the equivalent resistance.

A

Ohm’s Law

37
Q

Unit of electrical energy

A

Watt

38
Q

One joule of energy in one second is equal to how many watt/s?

A

1 Watt

39
Q

What is the capacity to do work?

A

Energy

40
Q

For American Wire Gauge, as the gage increases the size of the conductor _______?

A

Decreases

41
Q

In both series and parallel circuits the power is ______?

A

additive

42
Q

The heat produced in a current carrying conductor is proportional to ________?

A

Square of the current (I^2)

43
Q

1 calorie is equal to how many joules?

A

4.186 Joules

44
Q

1 BTU = _______ calories

A

252 calories

45
Q

Work = ______ x time

A

Power

46
Q

Formula for Equivalent Heat Energy in an Electrical Circuit

A

Q = 0.24Pt

P = Power
t = time
47
Q

Formula for Q when there is a change in temperature?

A

Q = mc(T2 - T1)

48
Q

VDT is used in ________ - connected Resistors

A

Series

49
Q

In VDT, the total voltage is multiplied to the ______ resistor where the voltage needs to be found. (HInt: same or other)

A

Same

50
Q

In this circuit, the total current is equal to the current experienced by each component.

A

Series Circuit

51
Q

In this circuit, the total voltage is the sum of all the voltages experienced by the components.

A

Series Circuit

52
Q

In this circuit the total current is equal to the sum of all current experienced by each component.

A

Parallel

53
Q

In this circuit the total voltage is equal to the voltage experienced by each component.

A

Parallel

54
Q

In CDT, the total current is multiplied to the _______ resistor to find the current needed. (Hint: same or other)

A

Other

55
Q

In a delta connected circuit with all its resistors having equal resistances the equivalent resistances in wye will be?

A

R(delta) = 3R (wye)

56
Q

In a wye connected circuit with all its resistors having equal resistances the equivalent resistances in delta will be?

A

R(wye) = R(delta) / 3

57
Q

This states that the algebraic sum of currents entering a node is zero.

A

KCL (Kirchoff’s Current Law)

58
Q

This states that the algebraic sum of all voltages around a closed path or loop is zero

A

Kirchoff’s Voltage Law (KVL)

59
Q

This states that the current in any resistor is equal to the algebraic sum of the currents delivered by each independent sources assuming that each source is acting alone or independently with respect to others.

A

Superposition Theorem

60
Q

This theorem can only be applied to circuits having linear bilateral elements

A

Superposition Theorem

61
Q

This theorem is used when the no. of voltage sources are in parallel having internal resistances respectively, the arrangement can be replaced with an equivalent voltage source V in series resistance R.

A

Millman’s Theorem

62
Q

A linear two-terminal ckt can be replaced by an equivalent consisting of a voltage source in series with an equivalent resistance

A

Thevenin’s Theorem

63
Q

A linear two-terminal ckt can be replaced by an equivalent ckt consisting of a current source in parallel with an equivalent resistance.

A

Norton’s Theorem

64
Q

In a circuit with the Voltage source in series with the resistor, how do you calculate for its equivalent current source and how do you connect the new equivalent circuit.

A

Voltage/Resistor , parallel

65
Q

In a circuit with the current source in parallel to a resistor, how do you compute for its equivalent voltage source and how do you connect its equivalent circuit

A

Current source x Resistor , Series

66
Q

Maximum Power is transferred to the load if the load resistance equals the _________ resistance as seen from the load terminals

A

Thevenin’s

67
Q

Pmax = ________?

A

(Thevenin Voltage)^2 / 4 x Load resistance

68
Q

The level of current that is considered dangerous to human and can cause temporary paralysis

A

10 mA

69
Q

The level of current that can cause Severe Shock when exposed to Human.

A

50 mA

70
Q

The level of current that may cause Human Fatality if exposed

A

100 mA

EE (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions