Voltage and Current

Q1: A voltage will influence current only if the circuit is:

A open

B insulated

C high resistance

D closed

Q2: What is a characteristic of a secondary cell?

A rechargeability

B not rechargeable

C a dry cell

D non-liquid

Q3: Which resistive component is designed to be temperature sensitive?

A Thermistor

B Rheostat

C Potentiometer

D Photoconductive cell

Q4: Batteries differ from fuel cells in that

A a battery is a closed system

B a battery uses hydrogen and oxygen to create electricity

C a battery uses a polymer electrolyte membrane

D none of the above

Q5: An example of potential energy is:

A tea-kettle steam

B a moving vehicle

C the sun

D a battery

Q6: An element is a substance that is:

A varied throughout the entire piece

B used only in electronics

C electrically charged

D found only in its pure form

Q7: The negative and positive charge symbols are assigned (in that order) to the:

A proton and electron

B electron and proton

C atom and nucleus

D electron and element

Q8: The removal of a non-neutral subatomic particle converts the atom into a:

A charged ion

B nucleus

C heavier element

D compound

Q9: Which of the following statements is true?

A Unlike charges repel and like charges attract.

B Like charges repel and unlike charges attract.

C Unlike charges attract and like charges attract.

D Like charges repel and unlike charges repel.

Q10: The charge of one coulomb is equal to:

A 6.24 x 10−18 electrons

B one ampere

C one second

D 6.24 x 1018 electrons

Q11: One coulomb passing a point in one second is one:

A ampere

B volt

C ohm

D charge

Q12: In practical applications, battery voltage:

A is restored as soon as disconnect occurs

B is lowered as the load increases

C may be stored indefinitely

D will be reduced to zero as power is drawn

Q13: An ammeter is used to measure

A voltage

B current

C resistance

D All of the above

Q14: Current equals:

A mca1_1002a1.gif

B
coulombs × time

C mca1_1002c1.gif

D
voltage × time

Q15: Current is considered as the movement of:

A electrons

B protons

C charge

D nuclei

Q16: Which electronics material opposes the movement of free electrons?

A Conductor

B Insulator

C Semiconductor

D Element

Q17: The battery symbol is:

A mca1_1009a1.gif

B mca1_1009b1.gif

C mca1_1009c1.gif

D mca1_1009d1.gif

Q18: Which part of an atom has no electrical charge?

A Electron

B Neutron

C Proton

D All of the above

Q19: What is the name of the pressure that moves electrons in a closed circuit?

A amperes

B ohms

C voltage

D coulombs

Q20: A short circuit will have:

A a small current flow

B a large current flow

C no current flow

D some current flow

Q21: In which states may matter may be found?

A solid, liquid, or mineral

B solid, gas, or liquid

C mineral, gas, or liquid

D plastic, solid, or gas

Q22: If 40 C of charge flow past a point in 20 s, what is the current?

A 2 A

B 0.5 A

C 20 A

D 40 A

Q23:
What type of switch is this?

A push button

B SPST

C DPDT

D SPDT

Q24: Which is the smallest?

A atom

B proton

C neutron

D electron

Q25: A lead-acid battery is an example of a

A solar cell

B fuel cell

C primary battery

D secondary battery

Q26: What are the basic building blocks that all matter is composed of?

A electrons, neutrons, and protons

B two protons for each neutron

C two protons for each electron

D electrons, neutrons, and charged ions

Q27: What is the color code for a 220 omega.gif 5% resistor?

A Red, Red, Brown, Gold

B Orange, Orange, Black, Gold

C Red, Red, Black, Gold

D Red, Red, Brown, Silver

Q28: If 60 J of energy are available for every 15 C of charge, what is the voltage?

A 4 V

B 60 V

C 15 V

D 0.25 V

Q29: If a fluid system is compared to an electrical system, the fluid pump will correspond to a:

A conductor

B lamp

C battery

D insulator

Q30: Which unit of charge contains 6.25 × 1018 electrons?

A An ampere

B A coulomb

C A volt

D A joule

Q31: A voltmeter is used:

A to measure current

B in series with the circuit

C in parallel with the circuit

D to measure coulombs

Q32: Which voltage source converts chemical energy to electrical energy?

A Electrical generator

B Battery

C Solar cell

D Electronic power supply

Q33: If the current in a circuit equals 0 A, it is likely that the

A voltage is too high

B resistance is too low

C circuit has a short

D circuit is open

Q34: The term used to designate electrical pressure is:

A voltage

B current

C resistance

D conductance

Q35: The basic difference between a fuse and a circuit breaker is

A a fuse is slower

B a fuse is reusable

C a circuit breaker is reusable

D a circuit breaker is more reliable

Q36: In practical applications, battery voltage:

A is restored as soon as disconnect occurs

B is lowered as the load increases

C may be stored indefinitely

D will be reduced to zero as power is drawn

Q37: Current is:

A the presence of a positive charge

B the abundance of electrons

C the movement of electrons

D the repulsion of electrons

Q38: A basic electric circuit is made up of what components?

A A load, a resistor, and a conductive path for current

B A voltage source, a load, and a conductive path for current

C A voltage source, a conductive path for current, and a battery

D A conductive path for current, a battery, and a copper wire

Q39: An atom's atomic number is determined by the number of:

A neutrons minus protons

B protons

C electrons

D neutrons

Q40: How many valence shell electrons are there in semiconductor atoms?

A 16

B 8

C 4

D 2

Q41: If an electrical system is compared to a fluid system, the electrical current corresponds to the:

A pressure

B pump

C water wheel

D water flow

Q42: What do you call a diagram that shows the electrical connections of a circuit's components?

A A schematic diagram

B A pictorial diagram

C A block diagram

D An electrical diagram

Q43: When considering conventional current versus electron current flow:

A electron current flow came first

B protons move in conventional current flow

C conventional current flow came first

D the direction of current is the same in both methods

Q44: Primary batteries, unlike secondary batteries, may be:

A charged once

B used once

C recharged over and over

D stored indefinitely

Q45: A secondary cell generates dc via chemical activity; a primary cell generates dc:

A electrically

B thermally

C optically

D chemically

Q46: A switch is a device that:

A short circuits complex circuits

B holds a fuse

C has double poles

D opens or completes a current path

Q47: What are the unit and symbol for current?

A
Ampere, A

B
Coulomb, I

C
Ampere, Q

D
Ampere, I


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