Fichas
Circuits
Fichas del conjunto (37)
- 1What is this?The cell
- 2What is this?An open switch
- 3What is this?A closed switch
- 4What is this?A lamp/ filament lamp
- 5What is this?A battery
- 6What is this?A voltmeter
- 7what is this?Resistor
- 8What is this?Fuse
- 9What is this?An ammeter
- 10What is this?A variable resitor
- 11What is this?Thermistor
- 12What is this?Light-dependent resistor
- 13What is this?Light emitting diode
- 14What is this?A diode
- 15What has to be put in series?An ammeter
- 16What has to be connected in parallel?A voltmeter
- 17Resistors and currentThe current through a resistor is directly proportional to potential difference. Different resistors have different resistances
- 18Filament lamp in relation to resistance?As the temperature of the filament increases, the resistance increases, hence the curved graph.
- 19Diode and resistanceCurrent will only flow through a diode in one direction. The diode has very high resistance in the opposite direction
- 201. Why does resistance increase with temperature?1. When an electrical charge flows through a resistor, some of the electrical energy is transferred to heat energy- resistor gets hot
- 212. Why does resistance increase with temperature?This heat energy causes the ions in the conductor to vibrate more
- 223.Why does resistance increase with temperature?This makes it more difficult for the charge-carrying electrons to get through the resistor- the current can't flow as easily- resistance increases
- 234.Why does resistance increase with temperature?For most resistors, there is a limit to the amount of current that can flow. More current means an increase in temperature, which means an increase in resistance, which means the current decreases again
- 24What is a diode used for?Made of semiconductor material e.g. silicon. Regulates the potential difference in circuits
- 25What is a light-emitting diode used for?LEDs emit light when a current flows through it in the FORWARD direction. Use smaller current. Indicate presence of current in a circuit.
- 26What are light- dependent resistors used for?They are dependent on the intensity of light. Bright light= resistance falls, darkness= high resistance
- 27What is a thermistor?Temperature-dependent resistor. HOT conditions= resistance DROPS, COOL conditions = resistance INCREASES
- 28In series circuits, potential difference is..?SHARED
- 29In series circuits, current is..THE SAME EVERYWHERE
- 30In series circuits, resistance..?ADDS UP
- 31In series circuits, cell voltages..?ADD UP
- 32In parallel circuits, potential difference is..?THE SAME ACROSS ALL COMPONENTS
- 33In parallel circuits, the current is...?SHARED- total current flowing is equal to the total of all the currents through the separate components
- 34What is the voltage of UK mains supply?230 volts
- 35What is the UK mains supply- alternating or direct current?Alternating current- 50Hz
- 36What is AC?Alternating current- current constantly changes direction
- 37What is DC?DC- used by cells and batteries, current always flows in THE SAME DIRECTION
Información
- Descripción
- GCSE Physics Fichas sobre Circuits, creado por Gretta Mildred el 04/05/2015.
- Creado por
- Gretta Mildred
- Visitas
- 25
- Valoración