Physics - Circuits


What is the symbol for a wire in a circuit?


PHOTO WIRE CIRCUIT

What is the symbol for a resistor in a circuit?


PHOTO RESISTOR CIRCUIT

What is the symbol for a light bulb in a circuit?


PHOTO LIGHT BULB CIRCUIT

What is the symbol for a cell in a circuit?


PHOTO CELL CIRCUIT

What is the symbol for a battery in a circuit?


PHOTO BATTERY CIRCUIT

What is the symbol for a switch in a circuit?


PHOTO SWITCH CIRCUIT

PHOTO CELL CIRCUIT Which is the positive terminal?


The one on the left.

PHOTO CELL CIRCUIT What is the technique for remembering the positive and negative terminals on a cell?


You can draw a “P” on the big positive side.

2021-01-18

What is the symbol for a diode in a circuit?


PHOTO CIRCUIT DIODE

PHOTO CIRCUIT DIODE What does this represent in a circuit?


A diode.

What is the symbol for a resistor in a circuit?


PHOTO CIRCUIT RESISTOR

PHOTO CIRCUIT RESISTOR What does this represent in a circuit?


A resistor.

What is the symbol for a variable-resistor in a circuit?


PHOTO CIRCUIT VARIABLE-RESISTOR

PHOTO CIRCUIT VARIABLE-RESISTOR What does this represent in a circuit?


A variable resistor.

What is the symbol for a fuse in a circuit?


PHOTO CIRCUIT FUSE

PHOTO CIRCUIT FUSE What does this represent in a circuit?


A fuse.

What is the symbol for a voltmeter in a circuit?


PHOTO CIRCUIT VOLTMETER

PHOTO CIRCUIT VOLTMETER What does this represent in a circuit?


A voltmeter.

What is the symbol for a ammeter in a circuit?


PHOTO CIRCUIT AMMETER

PHOTO CIRCUIT AMMETER What does this represent in a circuit?


An ammeter.

What is the symbol for a thermistor in a circuit?


PHOTO CIRCUIT THERMISTOR

PHOTO CIRCUIT THERMISTOR What does this represent in a circuit?


A thermistor.

What is the symbol for a led in a circuit?


PHOTO CIRCUIT LED

PHOTO CIRCUIT LED What does this represent in a circuit?


An LED.

What is the symbol for a capacitor in a circuit?


PHOTO CIRCUIT CAPACITOR

PHOTO CIRCUIT CAPACITOR What does this represent in a circuit?


A capacitor.

Should you connect an ammeter in series or in parallel?


In series.

Should you connect a voltmeter in series or in parallel?


In parallel.

2021-01-29

Which way does a diode need to be pointing to let current through?


In the direction of the conventional current.

What is the threshold voltage for a silicon diode?


About $0.7V$.

2021-02-04

How do fuses work?


They contain a wire which melts if the current is too high.




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