| Quiz | Electricity |
|---|---|
| Name | |
| Result | PASSED |
| Score | 63 / 68 (92.6%) |
| Passing score | 54.4 |
| Quiz took | 14 min 58 sec |
| Quiz finished at | 2023-05-20 22:03:07 |
Mains electricity in Britain is
Which of the following can be used to change the size of the potential difference?
Name this electrical circuit symbol
The resistance of a LDR is larger in the
The brightness of 2 bulbs in the series circuit will be much ______ than the brightness of the bulbs in the parallel circuit.
Name this electrical circuit symbol
In a British plug, the blue wire is
There is a 230 V potential difference across the primary coil of a transformer and a 9 A current through this primary coil. There is a 12 A current through the secondary coil of the transformer. Calculate the potential difference across the secondary coil of the transformer.
If a material loses electrons it becomes
Which of these is not a formula for electrical power?
When conducting experiments, it is important to switch the circuit off between taking readings, because
____________ can be used to increase the potential difference.
Resistor A has a current of 4 A flowing through it when the potential difference across it is 20 V. What is the size of its resistance?
A device has a power rating of 3400 W and a resistance of 120 ohms. Calculate the size of the current flowing in the device.
An electric oven is connected to the mains at a potential difference of 230 V and takes a current of 40 A. Calculate the power rating of the oven
An electric current in a wire is a flow of
Name this electrical circuit symbol
Transformers only work with
Static electricity is caused by transfer of
Name this electrical circuit symbol
Name this electrical circuit symbol
If a material gains electrons it becomes
Name this electrical circuit symbol
A current of 2 A flows through a bulb for 2 minutes. The potential difference across the bulb is 6 V. Work out how much energy is transferred.
Calculate the charge that flows in three hours when there is a current of 0.25 A in a circuit.
This is the I-V graph for a
Name this electrical circuit symbol
Name this electrical circuit symbol
Electrons can be transferred from one object to another by
Name this electrical circuit symbol
In a British plug, the brown wire is
Name this electrical circuit symbol
This is the I-V graph for a
A 230 V potential difference is input into a transformer. The transformer has 50 turns on the primary coil and 120 turns on the secondary coil. Calculate the output potential difference.
Name this electrical circuit symbol
A positively charged duster and a positively charged rod will
Calculate the charge that flows 5 minutes when there is a current of 5mA in a circuit.
Power is measured in
A current of 5 A passes through a wire of resistance 40 ohms. Work out how much energy is transferred each second.
Name this electrical circuit symbol
This is the I-V graph for a
The national grid uses step-up transformers to transmit power at __________ , as this wastes less energy as heat and is a more efficient way to transmit power.
Transformers consist of two coils and
Name this electrical circuit symbol
Just before entering our homes, the electricity will go through a
A positively charged duster and a negatively charged rod will
A current of 2 A flows for 2 minutes. Calculate how much charge flows in this time.
Name this electrical circuit symbol
Name this electrical circuit symbol
A battery is
Name this electrical circuit symbol
____________ can be used to decrease the potential difference.
The resistance of a thermistor depends on its temperature. The higher the temperature,
Calculate the power rating of a microwave that transfers 30 kJ of electrical energy in 60 s.
Voltmeters must always be connected
Name this electrical circuit symbol
A charge of 12 C transfers 360 J of electrical energy through a resistor. Calculate the potential difference across the resistor.
Name this electrical circuit symbol
In a British plug, the yellow/ green wire is
A charge of 20 C passes through a motor. The potential difference across the motor is 9 V. Calculate how much energy is transferred.
LDR stands or
In order to minimise energy losses as heat, the national grid transports electrical energy at
Name this electrical circuit symbol
A charge of 4800 C flows through a filament lamp for 4 minutes. Calculate the average current in the filament lamp
Calculate the efficiency of an electric desk fan which has a total power input of 80 W and a useful power output of 60 W.
Name this electrical circuit symbol
In order to protect against humans being electrocuted, appliances are often
At home, your sockets provide