Electricity and DC Circuits Flashcard

Front

What is the total current at a junction in a circuit?

Back

The total current entering the junction equals the total current leaving it. This is known as Kirchhoff's first law.

Front

What is a thermistor?

Back

A thermistor is a semiconductor whose resistance decreases when the temperature increases.

Front

What is the flow of electric charge per unit time called?

Back

It is called current, and it is measured in amperes.

Front

What causes matter to experience a force in an electromagnetic field?

Back

Matter experiences a force in an electromagnetic field due to its charge.

Front

What happens to the resistance of an LDR when light intensity decreases?

Back

The resistance of an LDR increases when the light intensity decreases.

Front

What is the unit of current?

Back

The unit of current is amperes.

Front

What is the relationship between voltage and current in a circuit?

Back

Voltage is the force that pushes current through a circuit.

Front

What does an increase in temperature do to the resistance of a thermistor?

Back

The resistance of a thermistor decreases when the temperature increases.

Front

What is the role of a circuit in electricity?

Back

A circuit provides a path for electric current to flow.

Front

What is an LDR?

Back

An LDR (Light Dependent Resistor) is a resistor that changes its resistance based on light intensity.