WorksheetsY9 LC2 Separate Phys MCQ 2021
Total questions: 60
Worksheet time: 57mins
What needs to be done to fix this circuit?
One of the cells needs to be reversed
The battery is not the right way round
There needs to be a switch added
They haven't labelled the components
How much charge flows through a wire in 9mins if the current is a constant 3A?
1620 C
27 C
3 C
180 C
Electric current is the flow of...
neutrons
charge carriers
electrons
atoms
protons
State the equation that links charge flow, current and time
current = time x charge flow
time = current x charge flow
charge flow = current x time
charge flow = current / time
Select the unit of Electrical Charge with the correct shorthand
Amperes, A
Amperes, I
Coulombs, C
Coulombs, Q
What does a measurement of 30mA represent?
Current reading of 30,000 Amps
Current reading of 0.3 Amps
Current reading of 0.03 Amps
Current reading of 300 Amps
How long will it take to charge an iPad on 25% battery to fully charge if it draws 3.2A of current from a usb plug. Full battery of an iPad = 42000C.
2hr 17mins
3hr 39mins
0hr 55mins
2hr 44mins
If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the potential difference across the light bulb?
5 V
12 V
0.2 V
20 V
If the total current (Itotal) is measured to be 0.02 A, What is the voltage measured at R1?
2 V
3 V
5 V
9 V
Select the unit for Potential Difference with the correct shorthand
Amperes, A
Amperes, I
Volts, V
Voltage, V
Select the correct definition for potential difference
The difference in electrical charge between two points in a circuit
The difference in electrical potential energy between two points in a circuit
The amount of energy the battery can store
The amount of voltage that is dissipated in a wire due to resistance and heating
Potential difference = Current x Resistance.
Calculate the potential difference across a 20 Ohms resistor with 3 Amps of current running through it.
23V
60V
0.15V
6.7V
If the battery produced 12.6 Volts what would be the current flow for a 6 Ohm resistor?
2.1 Amps
2.4 Amps
1.71 Amps
15 Amps
What is the potential difference across the 50 Ohm resistor when a current of 40mA flows?
1.0V
2.0V
3.0V
4.0V
In parallel circuits...
the current is the same everywhere.
the current splits at a junction.
the voltage is the same everywhere.
the voltage splits at a junction.
What device do we use to measure potential difference and how do we connect it?
Ammeter connected in series
Ammeter connected in parallel
Voltmeter connected in series
Voltmeter connected in parallel
How many junctions does this parallel circuit have?
8
6
4
2
What is the reading on the labelled ammeter?
(a)
What is the missing value on the voltmeter?
(a)
What is the missing value on the ammeter?
(a)
What is the reading on the voltmeter around the cell?
(a)
What component could you add to a circuit to allow the resistance to change dependent on the level of light?
Variable Resistor
LDR
LED
Lumoresistor
After 0.02s the resistance of the light bulb increases. Which of the following statements is incorrect about why its resistance increases.
Metal ions vibrate faster
More collisions between electrons and metal ions
Temperature has increased
More electrons travelling through the wire
Brightness increases
Brightness decreases
Brightness doesn't change
in which circuit is the lamp brightest
1
2
3
All the same
in which circuit is the lamp brightest
1
2
3
All the same
Which resistor has the biggest voltage across it?
2 Ω
3 Ω
4 Ω
all have the same
A cyclist at the top of a hill has...
Kinetic Energy
Chemical Potential Energy
Elastic Potential Energy
Gravitational Potential Energy
A hot drink has...
Kinetic Energy
Heat Energy
Thermal Energy
Nuclear Energy
The Law of Conservation of Energy states:
Energy can created or destroyed but not transformed
Energy cannot be created or destroyed, it can only transformed
Energy can't be created, destroyed or transformed
Energy cannot be created or destroyed.
A lightbulb which has a 65% efficiency outputs 1755J of light energy in 45s. What is the power rating of the lightbulb?
(a)
What are the benefits of having a clean, rust-free and well lubricated bike chain? (Select all which apply)
Reduces Efficiency
Less Energy Wasted
Less Frictional Forces
Reduces Power Output
Which two of the following energy transfers are wasteful for a van.
Chemical -> Thermal
Chemical -> Kinetic
Chemical -> Electrical
Chemical -> Sound
Solar panels in the UK receive much fewer hours of sunlight over the course of a year when compared to solar panels in Spain. What effect will this have on the UK panel's efficiency and power output?
Efficiency Decrease, Power Decrease
Efficiency Increase, Power Decrease
Efficiency Unchanged, Power Decrease
Efficiency Increase, Power Increase
Efficiency Increase, Power Decrease
The Ferris wheel transfers 3kJ of energy from its chemical energy store to 1800J of kinetic energy and 1200J of thermal energy. What is the efficiency of the Ferris wheel?
40%
60%
67%
100%
Which equations correctly link energy, power and time?
Power = energy x time
Power = energy / time
Energy = Power / time
Energy = Power x time
A Ferris wheel transfers 3 KJ of chemical energy every 3s. What is its power rating?
1
9
100
1000
9000
A sling shot has a spring constant of 20 N/m. How much elastic potential energy is stored in the sling shot when it is extended 30 cm?
0.9 J
1.8 J
3 J
6 J
A present with a mass of 0.5kg was lifted 2.3m high. Gravitational field strength = 9.8 N/kg. What was the gravitational potential energy gained by the present at 2.3m?
4.9 J
11.3 J
22.5 J
45.1 J
Santa's sleigh gains 900MJ of gravitational potential energy when flying over Warrington. It has a mass of 9 X 105 kg. Assume gravitational field strength is 10 N/kg. How high up is Santa and his sleigh?
1 m
10 m
100 m
1000 m
A reindeer with a mass of 160kg can run at a top speed of 19 m/s. How much kinetic energy will the reindeer have running at its top speed?
1520 J
57760 J
28880 J
8.4 J
If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have?
5.4 J
1.8 J
3 J
6 J
What word is used to describe when energy transferred to surroundings in less useful ways. Often referred to as 'wasted' energy?
Dissipated
Delivered
Dissociated
Devolved
What is the correct definition of efficiency?
The higher the efficiency, the more energy is transferred.
The higher the efficiency, the more energy is transferred wastefully.
The higher the efficiency, the more energy is transferred usefully.
The higher the efficiency, the better the machine will run.
Which unit is the same as joules per second (J/s) and is the unit for power?
Watts
Volts
Amperes
Coulombs
What word means the rate of energy transfer?
Voltage
Power
Energy
Velocity
Anther word for when something is transmitted or transferred from one place to another, for example in the case of heat passing from one place to another.
Contract
Confer
Conduct
Comply
In a metal, what is the word used that is a measure of how difficult it is for electrons to flow through the metal?
Voltage
Current
Resistance
Charge
