Wrap Up Flashcard

Front

What is the correct symbol for a LDR (light dependent resistor)?

Back

The symbol for a Light Dependent Resistor (LDR) is a rectangle with two arrows pointing towards it, indicating light.

Front

What is the primary function of a thermistor in a circuit?

Back

To measure temperature changes.

Front

What is the normal force?

Back

The normal force is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

Front

What is half-life in the context of radioactive decay?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

If the half-life of a substance is 2.4 minutes, how much of a 100.0 g sample remains after 7.2 minutes?

Back

12.5 g.

Front

What is the definition of weight force?

Back

Weight force is the force exerted by gravity on an object, calculated as the mass of the object multiplied by the acceleration due to gravity (W = mg).

Front

What is the difference between applied force and frictional force?

Back

Applied force is the force applied to an object to move it, while frictional force opposes the motion of the object.

Front

What is the role of a resistor in a circuit?

Back

A resistor limits the flow of electric current in a circuit.

Front

What is the definition of a thermistor?

Back

A thermistor is a type of resistor whose resistance varies significantly with temperature.

Front

What is the significance of the term 'isotope'?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.