Current, voltage and resistance
Authored by Syamimi Manah
Physics
7th Grade
NGSS covered
Used 233+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A student uses a length of wire as a resistor. He makes a second resistor from the same material.
To be certain of making a second resistor of higher resistance, he should use a piece of wire that is:
longer and thicker.
longer and thinner.
shorter and thicker.
shorter and thinner.
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The table describes four different resistance wires.
They are all made from the same metal.
Which wire has the smallest resistance?
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The circuit shown contains a battery, a 6.0 Ω resistor and two meters X and Y.
One meter records current and one meter records potential difference.
meter X : 2.0 A
meter Y : 12.0 V
meter X : 2.0 V
meter Y : 1.0 A
meter X : 12.0 A
meter Y : 2.0 V
meter X : 12.0 V
meter Y : 2.0 A
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
most brightly: W
least brightly: Y
most brightly: W
least brightly: Z
most brightly: X
least brightly: Y
most brightly: X
least brightly: Y
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The diagram shows a circuit with a 3.0Ω and a 2.0 Ω resistor connected in parallel.
The switch is open, and the ammeter reads 2.0 A.
The switch is now closed and the ammeter reads the total current in both resistors.
What is the ammeter reading with the switch closed?
1.2 A
3.0 A
4.0 A
5.0 A
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Which equation can be used to calculate the resistance R of a resistor?
V = I / R
I = V x R
R = V x I
V = I x R
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The diagrams show four current-voltage graphs.
Which two graphs show the characteristics of an ohmic resistor and of a filament lamp?
ohmic resistor : W
filament lamp : Y
ohmic resistor : X
filament lamp : Y
ohmic resistor : W
filament lamp : Z
ohmic resistor : X
filament lamp : Z
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