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WorksheetsTERM 3 REVISION
Total questions: 32
Worksheet time: 20mins
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Rubbing your hands together is an example of ...
Friction
Induction
Electrostatic attraction
An uncharged object has an equal number of (a) and electrons
Calculate the charge of the object alongside. (count the excess charges after cancelling pairs of electrons & protons)
-4
+4
-2
+2
Q.
The ruler and cloth were initially neutral. the cloth was then rubbed onto the ruler. The object that has picked up a negative charge is the (a)
Energy possessed by an object by virtue of it's motion________
Kinetic energy
Potential energy
Thermal energy
Heat from the sun travels to earth by a process of...
Conduction: Transfer of heat between objects in direct contact
Convection: Transfer of heat through the motion of gas / liquid particles
Radiation: Transfer of heat through electromagnetic waves without using particles.
Energy possessed by an object by virtue of it's height ......................... ................
(a)
In electron flow , charges move from ________
positive to negative terminal
negative to positive terminal
any terminal direction
If you drop a ball from 5M, its potential energy will ______
Decrease
Increase
The following circuit symbol is of a _______
Switch
Resistor
Fuse
The electrical safety device that breaks a circuit due to a fault in the appliance is called a (a)
Study the circuits alongside. The cells found in the circuits are 9V each. Which circuit will have the highest voltage?
Circuit 1
Circuit 2
Circuit 3
The element in a kettle or toaster act as a large resistor
True
False
Which of the following can make an electromagnet stronger? (select all that apply)
Increasing the number of turns of wire around the nail/core
increasing the number of cells
decreasing the number of cells used
Decreasing the number of turns of wire around the nail/core
Name a component that can be added to an electromagnet to turn on and off the magnetic field.
(a)
An (a) is a device used to measure current.
Good conductors offer ...
high resistance
low resistance
Choose the correct option that describes the relationship between current & voltage..
As voltage increases, current increases
As current increases, voltage increases
As voltage increases, current decreases
In which of the circuits alongside will total voltage be shared ?
A. Series
B. Parallel
The relationship between resistance and current can be expressed as..
A directly proportional relationship (when resistance increases so does the current)
An inversely proportional relationship (when resistance increases the current decreases)
The components of a system are :
input unit
device
input unit
process unit
output unit
process unit
What happens to the brightness of the bulbs when more bulbs are added in parallel ?
brightness increases
brightness stays the same
brightness decreases
All forms of radiation that we can see with our eyes is termed: .................. .........
(a)
The sun, stars, candles and light bulbs are luminous objects.
True
False
If the hole in the pinhole camera is made bigger, the resulting image will :
become clear and sharp
become blur
Light is transmitted through objects that are :
transparent or translucent.
Opaque
Reflective
The frequency of a wave is the number of waves that move past a point one second. Which colour of light has the lowest frequency? (a)
When all light is reflected by an object, it will appear
translucent
black
white
The protective front covering of the eye that is completely transparent is the ...
Optic nerve
retina
cornea
lens
Which of the following diagrams shows light that is reflected off a smooth surface?
Diagram A
Diagram B
Both diagram A & B
TRUE OR FALSE ?
In regular reflection, the angle of incidence is UNEQUAL to the angle of reflection
True
False
Name the phenomenon represented by the straw in the picture alongside. (a)
