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Rad135 Ch3 Electricity
Test Description: This content covers chapter 3 (Electricity) from the text to help you prepare for the midterm exam in Rad135.
Instructions: Answer all questions to get your test result.
1) What material resists the flow of electrons?
A
conductor
B
insulator
C
superconductor
D
semi-conductor
2) What part in the laws of electrostatics states that charges reside on the external surfaces of conductors and evenly throughout nonconductors?
A
inverse square law
B
movement
C
distribution
D
repulsion-attraction
3) Which of the following is considered to be a superconductor?
A
glass
B
silicon
C
copper
D
titanium
4) Which term is used to describe the force or strength behind the electron flow?
A
potential difference
B
law of conservation
C
law of electrostatics
D
Ohm's law
5) What is used to explain the presence of an electron flow?
A
impedance
B
voltage
C
current
D
ohm
6) What law describes the relationship between current, potential difference, and resistance that applies to all resistance circuits?
A
Ohm's law
B
law of electrostatics
C
inverse square law
D
law of conversion
7) When opposite charged objects are close in proximity, the electrons may jump the gap to form ____.
A
electric fields
B
ionic solutions
C
friction
D
static discharge
8) What is the total resistance in a series circuit with 3 resistors with 3, 6 and 9 ohms?
A
18/11 ohms
B
18 ohms
C
18 amps
D
18 volts
9) What is the process of electrostatic fields acting on one another without contact called?
A
movement
B
induction
C
friction
D
contact
10) Given 3 light bulbs in a parallel circuit and then the same light bulbs in a series circuit, which of the following is true?
A
A voltmeter can be connected in series in either circuit to measure potential difference.
B
The lights will glow brighter in the parallel circuit.
C
The ammeter will read the same anywhere in the parallel circuit.
D
The total resistance of the parallel circuit will be greater than that of the series circuit.
11) What form of electrification happens when two objects touch, allowing electrons to move from one to the other?
A
friction
B
movement
C
induction
D
contact
12) What is the total resistance in a circuit with a 2 ohm, a 4 ohm and a 6 ohm resistors in parallel?
A
12 ohms
B
1.09 ohms
C
12 amps
D
0.92 ohms
13) A 100 watt lightbulb with an amperage of 0.91 A is operating at a potential difference of:
A
110 kV
B
100 V
C
110 V
D
110 ohms
14) One hertz (Hz) is equal to: ____.
A
60 cycles per second
B
220 cycles per second
C
1 cycle per second
D
50 cycles per second
15) In a parallel circuit: ____.
A
total current flow is equal across its parallel branches
B
as more resistors are added, total resistance is unaffected
C
the voltage is equal across all branches of the circuit
D
Ohm's law does not apply
16) An electrical device that is designed to store charge momentarily after charging is a(n): ____.
A
stator
B
capacitor
C
battery
D
diode
17) When electrified, one object has more electrons than another, that object also has ____ negative charges.
A
more
B
equal
C
less
D
unchanged
18) Which of the following is NOT true regarding protons?
A
loosley bound in the outer shell of an atom
B
tightly bound within the nucleus
C
smallest unit of positive charge in an atom
D
equal to the z number of the element
19) Electricity concerns the distribution and movement of _____.
A
photons
B
electrons
C
nuetrons
D
protons
20) Which is NOT a law of electrostatics?
A
ionization
B
inverse-square law
C
replusion-attraction
D
distribution
*select an answer for all questions
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