F2 - SEM1 - Circuit - 8.3 Voltage Flashcards
We measure the voltage of a cell with a __________
Voltmeter
A voltmeter should be connected ___________ the cell
Across
It’s ______ knob should be connected to the positive terminal of the cell and it’s _______knob to the negative terminal
Red black
What if the red knob goes to the negative terminal
The voltmeter will be damaged
The higher the voltage, the ________________ the current flowing through the circuit
Larger
True or false
The unit of voltage is the ampere
False
True or false
The black knob of a voltmeter should be connected to the negative terminal of the cell
True
True or false
Voltage presents the amount f electrical energy supplied by the cell to the electrons in a circuit
True
True or false
The voltage across two cells is higher than that across a single cell if the two cells are connected in opposite directions
False
A voltmeter is used to measure the voltage across the cell. Which of the following circuit shows the correct connection ?
D
What does the value of voltage indicate?
8.3 Voltage
Indicates how much energy is supplied by the cell to the electric charges in a circuit
8.3 Voltage
What is the function of a voltmeter?
8.3 Voltage
Measure the voltage of a cell
8.3 Voltage
What is the unit of voltage?
8.3 Voltage
Volt (V)
8.3 Voltage
How to connect a voltmeter to measure the voltage of a power supply?
8.3 Voltage
red knob —> positive terminal
black knob —> negative terminal
8.3 Voltage
What is the voltage of each of the below power sources?
- Zinc carbon D cell
- Alkaline D cell
- Button cell
- Rechargeable cell
- Zinc carbon D cell: 1.5V
- Alkaline D cell: 1.5V
- Button cell: 3V
- Rechargeable cell: 1V
Voltmeter
