WorksheetsUnit 4 Circuits Pre-Test
Total questions: 20
Worksheet time: 2hrs 40mins
i1 + i5 +i4 = i2 + i3
i1 + i5 +i3 = i2 + i4
i5 + i2 +i4 = i1 + i3
i1 + i5 = i2 + i3 + i4
emf stands for
electron motion force
potential difference
electromotive force
electromagnetic force
The defining word equation for the Volt
energy per unit charge
rate of flow of charge
work per unit time
product of electrical resistance and current
If three 1.5 V cells are connected in series
the combined emf is 4.5 V and it will last as long as a single 1.5 V cell
the combined emf is 1.5 V and it will last as long as a single 1.5 V cell
the combined emf is 4.5 V and it will last longer than a single 1.5 V cell
none of these
If three 1.5 V cells are connected in parallel
the combined emf is 4.5 V and it will last as long as a single 1.5 V cell
the combined emf is 1.5 V and it will last longer than a single 1.5 V cell
the combined emf is 4.5 V and it will last as long as a single 1.5 V cell
none of these
A circuit contains a length of tungsten wire with resistance R. An increase in the resistance would result if which of the following could be decreased?
The resistivity of the tungsten
The cross-sectional area of the wire
The length of the wire
The temperature of the wire
The current in the wire
The circuit above contains four identical lightbulbs connected to a battery. Which of the following procedures would increase the brightness of bulb A and decrease the brightness of bulb D?
I. Replacing bulb B with an open switch
II. Replacing bulb C with a closed switch
III. Replacing the battery with another battery of higher voltage
I only
II only
I and II only
II and III only
I, II, and III
The circuit in the figure above contains two identical lightbulbs in series with a battery. At first both bulbs glow with equal brightness. When switch S is closed, which of the following occurs to the bulbs?
Bulb 1: Goes out
Bulb 2: Gets brighter
Bulb 1: Gets brighter
Bulb 2: Goes out
Bulb 1: Gets brighter
Bulb 2: Gets slightly dimmer
Bulb 1: Gets slightly dimmer
Bulb 2: Gets brighter
Bulb 1: Nothing
Bulb 2: Goes out
Which of the following correctly states relationship between voltage, resistance, and current in a circuit?
Current is directly related to voltage but inversely related to resistance.
Current is directly related to both voltage and resistance.
Current is inversely related to both voltage and resistance.
Current is directly related to voltage but is not affected by resistance.
What is the equivalent or total resistance (Re) across this circuit?
3 kΩ
10 kΩ
13 kΩ
18 kΩ
If the length of a wire increases, the resistance ____________
a. decreases
b. increases
c. stays the same
d. unknown
How does the thickness of a wire affect resistance?
A thicker wire has more resistance
A thinner wire has more resistance
Thickness of a wire does not affect resistance
What effect does a hotter temperature have on resistance?
No effect
Increases resistance
Decreases resistance
Stays the same
In a series circuit which of the following will vary based on the resistor
Resistance
Voltage
Current
None of the above
