WorksheetsFormative Assessment Topic 3: DC
Total questions: 15
Worksheet time: 6mins
Define electric current
the total charge, Q flowing through the area per unit time, t.
the total current, I flowing through the area per unit time, t.
the rate of capacitance flow through a conductor.
the rate of current flow through a conductor
If current flow in a bulb is 1.5A. What is the charge flow in 5 minutes?
4.5x10exp-2 C
4.5x10exp-2 A
2.4x10exp-2 C
2.4x10exp-2 A
Resistivity is defined as .....
the capacitance of a unit length per unit cross-sectional area of the material
the resistance of a unit length per unit cross-sectional area of the material
the capacitance of a unit cross-sectional area per unit length of the material
the resistance of a unit cross-sectional area per unit length of the material
From the equation, we know that the resistance of a conductor depends on..?
length of conductor
cross sectional area
type of material
volume of the wire
State Ohm's Law.
the potential difference across a metallic conductor is proportional to the resistance flowing through it if its temperature is constant.
the resistance across a metallic conductor is proportional to the current flowing through it if its temperature is constant.
the potential difference across a metallic conductor is proportional to the current flowing through it if its temperature is constant.
the current across a metallic conductor is proportional to the potential difference flowing through it if its temperature is constant.
Which equation defines Ohm's Law?
V=IV
R=VI
I=VR
V=IR
What is the effective resistance for two resistors that each has 15ohm resistance and they are connected in parallel?
7ohm
7.5ohm
7.2ohm
7.25ohm
A resistor of 5ohm is connected in series with two other resistors that is connected in parrallel, each has 3ohm resistance. Calculate the effective resistance for this combination of resistors.
60ohm
12ohm
6.5ohm
13.45ohm
In a standard series circuit, the voltage is the same everywhere in the circuit.
True
False
Find the equivalent resistance across the terminal A & B of the following electrical network
2 Ω
4 Ω
6 Ω
8 Ω
How should you put in an Ammeter?
Parallel
Series
How should you put in an volt meter?
Parallel
Series
find the current of I3
0.429 A
0.143 A
0.286A
Electrical power can be calculated using
Resistance x Voltage
Voltage ÷ Current
Voltage x Current
Current x Resistance
An electric kettle of 2200 W is used for 1 min.
How much electrical energy is used?
2200 J
122000 J
132000 J
264000 J
