NS Grade 9 Revision Quiz 2
Quiz by Sharon Barry
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The following is true of the free body diagram below:
29The object will remain in the same position
The object will move to the left
The gravitational force exerts a horizontal force
The force to the right is greater than the force to the left
- Q1
The following is true of the free body diagram below:
The object will remain in the same position
The object will move to the left
The gravitational force exerts a horizontal force
The force to the right is greater than the force to the left
30s - Q2
The forces represented by A,B and C in the diagram below are:
A: Gravitational Force; B: Weight; C: Frictional force
A: Frictional force; B: weight; C: Frictional force
A: Gravitational force; B: Directional force; C: Frictional Force
A: Directional / contact Force; B: Gravitational Force; C: Frictional force
30s - Q3
The following statement is true about the diagram of two magnets below
A represents the South Pole of the magnet
A and N exert a contact force on each other
The two magnets experience a force of attraction between them
A represents the North Pole of the magnet
30s - Q4
In a grade 9 experiment, three polystyrene balls are suspended by nylon string and the class observes how they behave. The diagram below represents what the learners observe. Which statement is correct about the experiment:
A & B are both positively charged
A& B repel each other
B has a negative charge
A&B are both negatively charged
30s - Q5
The following statements about resistors are all true, except:
Resistors could increase the distance between 2 points on a circuit
Resistors are made of insulation materials
Resistors could be made of material that is less conductive than copper
Resistors slow down the flow of electrons
30s - Q6
In the diagram below, the 2 cells in series making up the battery each have a potential difference of 3V. The bulbs are identical. The reading on V3 will be:
3V
Will depend on the current in the circuit
6V
9V
30s - Q7
In the circuit below, V1 shows a reading of 6V. Ammeter A1 shows a reading of 600mA. What is the resistance of bulb B1?
10 Ohms
1 Ohm
0.01 Ohms
0.1 Ohms
30s - Q8
Choose the correct phrase to complete the following sentence: Earthing is____________
Current flowing through an unintended path
Instantaneous discharge to the earth
A flow of electrons through the neural wire
A thin wire that will melt and break an overloaded circuit
30s - Q9
The following statements are true about a circuit containing 2 bulbs in parallel, and 2 x 1,5V cells in series
The bulbs will be dull because they have a higher resistance than in series, and a voltmeter across the parallel branch of the circuit will show a reading of 3V
A voltmeter across the parallel branch of the circuit will read 3V and the bulbs will be brighter because they have less resistance than in a series circuit
The bulbs will be bright because they have a lower resistance than in series, and a voltmeter across the parallel branch of the circuit will show a reading of 1,5V
The bulbs will be dull because they have a higher resistance than in series, and a voltmeter across the parallel branch of the circuit will show a reading of 1,5V
30s - Q10
Protons bombarding Uranium atoms is an example of a ____________ reaction
Nuclear fusion
Reverse osmosis
Hydrogen power
Nuclear Fission
30s - Q11
A coal fired power station operates with the following stages to generate electrical energy:
Neutrons bombard uranium nucleus → turbine → generator
Coal → furnace → steam → turbine → generator
Furnace → coal → crusher → turbine → generator
Coal → Steam → generator → turbine → furnace
30s - Q12
A game consul has a power rating of 1500W. It is used for 2 hours per day.. Express the electrical energy consumed in the correct units.
0,3 kWh
3000Wh
30kWh
3 kWh
30s - Q13
The fourth planet from the sun is:
Earth
Jupiter
Venus
Mars
30s - Q14
The following statement best describes a solar system:
Meteorites and meteors orbiting in space
Large planets with orbiting moons
Galaxies in the universe
A celestial system with the sun at its core.
30s - Q15
The following statement is true about the oceanic crust:
It is thin and very dense.
It is thick and has a low density.
It is made up of mostly granite rock.
It is found in river beds, dams, and lakes.
30s
