WorksheetsOhm's Law
Total questions: 22
Worksheet time: 19mins
Electricity is the flow of (a) .
What is the main source of our electrical energy?
Batteries
Dynamos
Generators
Solar panels
A Van de Graaff generator uses ___ and a moving belt to charge a large metal sphere to a very high voltage.
Static electricity
Current electricity
TRUE or FALSE
The electrons always flow in the direction opposite to the flow of conventional electric current.
True
False
What type of electric current do batteries provide?
AC
DC
both AC and DC
either AC or DC
Electric motors turn electricity into:
Information
Moving pictures
Sounds
Motion
To measure the resistance of an electrical component, ___.
An ammeter and a voltmeter are connected in series with the components in the circuit.
An ammeter and a voltmeter are connected in parallel to the components in the circuit.
An ammeter is connected in parallel to the component and a voltmeter in series.
An ammeter is connected in series to the component and a voltmeter in parallel.
Write 2 forms of energy that a TV converts electricity into.
(a)
Which scientist investigated the relationship between current and voltage?
Andrėi Marie Ampėre
Georg Simon Ohm
Alessandro Volta
Benjamin Franklin
The potential difference between two points is called (a) .
Which statement/s describe/s the apparatus shown.
It measures electric current.
It measures how much energy pushes the electron.
It is connected in parallel to the component.
It is connected in series with the components.
Odd one out!
Look at the images and decide which one does not belong to the group.
TRUE or FALSE
The longer the metal conductor, the lower is the resistance.
True
False
Which one of the following is not true about the factors affecting resistance?
A thin wire has a greater resistance than a thick one.
Plastics have high resistance so electrons can flow.
When temperature is increased, resistance also increases.
A short wire has a lower resistance.
The higher the resistance, the easier it is for electrons to flow.
Absolutely true!
Definitely not!
I'm not really sure.
Maybe?
A conducting wire has a resistance of 10 Ω. If the potential difference between the two ends of the wire is 50 V, how much current is flowing through the wire?
(a)
An electric bulb with an electric potential of 220 V allows the flow of current of 2 A. What is the bulb's resistance?
(a)
How much resistance does a lamp create if it has a current of 25 mA around it in a 9 V circuit?
(a)
What is the potential difference across a hand-held fan that has a resistance of 120 Ω and a current of 50 mA flowing through it?
(a)
Given:
R = 5 Ω
V = 6 mV
Find I
(a)
ESSAY Question 1:
What is electricity and how important is it? Give at least 3 examples of how we use electricity. (5 points)
ESSAY Question 2:
Compare direct current and the alternating current. Give one example of each type. (5 points)
