Review Game Zone
Flash Cards
(current)
Games
Teachers
Search
Introduction To Current Electricity
Test Description: Introduction to current and resistance
Instructions: Answer all questions to get your test result.
1) Compared to insulators, metals are better conductors of electricity because metals contain more free
A
positive ions
B
protons
C
negative ions
D
electrons
2) If 10 C of charge passes a given point in a conductor every 2 seconds, the current at that point is
A
0.2A
B
20A
C
5A
D
10A
3) An ampere can be defined as one
A
Newton per coulomb
B
ohm per volt
C
joule per coulomb
D
coulomb per second
4) One coulomb per second is equal to one
A
volt
B
ampere
C
ohm
D
watt
5) A wire carries a current of 6A. How much charge passes a point in the wire in 120s?
A
6C
B
20C
C
360C
D
720C
6) The resistance of a metallic wire conductor is inversely proportional to its
A
length
B
temperature
C
tensile strength
D
cross sectional area
7) If the diameter of a wire were decreased, its electrical resistance would
A
increase
B
remain the same
C
decrease
8) When a light bulb is turned on, its thin wire filament heats up quickly. As the temperature of this wire filament increases, its electrical resistance
A
remains the same
B
decreases
C
increases
9) If a wire of cross sectional area equal to A has a resistance of R, then another wire of the same material with a cross sectional area equal to 2A will have a resistance of
A
0.5R
B
2R
C
R
D
0.25R
10) A student needs to increase the resistance in a circuit. All that is available for this task is a wide variety of wires of different lengths and thicknesses. To obtain the maximum resistance, the student should replace the wire with one that is
A
longest and thickest
B
shortest and thinnest
C
shortest and thickest
D
longest and thinnest
11) As the temperature of a coil of copper wire increases, its electrical resistance
A
decreases
B
remains the same
C
increases
12) If both the cross-sectional area and the length of a metallic conductor were doubled, the resistance of the conductor would be
A
doubled
B
unchanged
C
halved
D
quadrupled
13) If the length of a copper wire is reduced by half, then the resistance of the wire will be
A
doubled
B
halved
C
quadrupled
D
quartered
14) To increase the brightness of a desk lamp, a student replaces a 50W light-bulb with a 100W lightbulb. Compared to the 50W light-bulb, the 100W light-bulb is
A
less resistance and draws less current
B
more resistance and draws more current
C
more resistance and draws less current
D
less resistance and draws more current
15) An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, the current through the resistor is
A
quartered
B
doubled
C
quadrupled
D
halved
16) Which changes would cause the greatest increase in the rate of flow of charge through a conducting wire?
A
decreasing the applied potential difference and decreasing the length of the wire
B
increasing the applied potential difference and decreasing the length of the wire
C
decreasing the applied potential difference and increasing the length of the wire
D
increasing the applied potential difference and increasing the length of the wire
17) Copper is a metal commonly used for electrical wiring in houses. Which metal conducts electricity better than copper at 20C?
A
silver
B
nichrome
C
aluminum
D
gold
*select an answer for all questions
Check Results & Get Answers
Play Games with the Questions Above
Teachers: Create FREE classroom games with your questions
Click for more info!
©2007-2024
ReviewGameZone.com
|
About
|
Privacy
|
Contact
|
Terms
|
Site Map
WAIT! Find what you needed?
×
Still Looking for the Answers?
Have Another Question?
Play a Review Game with These Questions?
Want to Make Your Own Test Like This One?