Physics Required Practicals Quiz

What are the two main required practicals discussed in the video for the AQA Combined Science exams?

• Specific heat capacity and IV graphs

• Density and pressure

• Magnetism and electromagnetism

• Waves and optics

In the specific heat capacity practical, what is the purpose of wrapping the metal block in insulation?

• To change the color of the block

• To make the block easier to handle

• To prevent energy transfer to the surroundings

• To increase the mass of the block

Which equation is used to calculate specific heat capacity in the simpler method?

• E = mc²

• E = m × c × θ

• F = ma

• P = IV

In the advanced method for specific heat capacity, which device is used to measure current?

• Joule meter

• Ammeter

• Thermometer

• Voltmeter

What is the formula for power used in the advanced method of the specific heat capacity practical?

• P = I × V

• P = E × t

• P = F × d

• P = m × g

What does the 'I' in IV graphs stand for?

• Current

• Intensity

• Impulse

• Insulation

In an IV graph, what is the purpose of using a variable resistor?

• To decrease mass

• To increase voltage

• To change the resistance and current

• To measure temperature

What happens to the resistance of a filament lamp as the current increases?

• Resistance remains constant

• Resistance decreases

• Resistance becomes zero

• Resistance increases

How does a diode affect the flow of current in an IV graph?

• It allows current to flow in both directions

• It blocks all current flow

• It allows current to flow in one direction only

• It increases the current flow

What is the relationship between current and potential difference for a resistor at constant temperature?

• They are equal

• They are unrelated

• They are directly proportional

• They are inversely proportional