Physics |_ T 2 revision

What are the three main types of nebulae?

• Planetary nebulae

• Galactic nebulae

• Supernova remnants

• Emission nebulae, Reflection nebulae, Dark nebulae

Which type of nebula is known for star formation?

• Supernova remnants

• Planetary nebulae

• Dark nebulae

• Emission nebulae

What is the primary theory that explains the movement of Earth's plates?

• Seafloor spreading

• Plate tectonics

• Continental drift

• Geosyncline theory

What are tectonic plates made of?

• Tectonic plates consist solely of the Earth's core.

• Tectonic plates are made of liquid magma.

• Tectonic plates are made of the Earth's lithosphere, including the crust and upper mantle.

• Tectonic plates are formed from atmospheric gases.

What is the difference between continental and oceanic plates?

• Oceanic plates are thicker and less dense than continental plates.

• Both continental and oceanic plates have the same thickness and density.

• Continental plates are thicker and less dense than oceanic plates, which are thinner and denser.

• Continental plates are thinner and denser than oceanic plates.

What happens at a convergent plate boundary?

• Tectonic plates slide past each other without interaction.

• Two tectonic plates collide, leading to subduction, earthquakes, and volcanic activity.

• Two tectonic plates float on magma, leading to calm seas.

• Two tectonic plates move apart, causing rift valleys.

How does a parallel circuit differ from a series circuit?

• A parallel circuit has a single path for current, while a series circuit allows multiple paths.

• In a parallel circuit, all components must be connected in a line, unlike a series circuit.

• A series circuit can operate without any resistance, while a parallel circuit requires resistance to function.

• A parallel circuit allows multiple paths for current, while a series circuit has a single path.

In a parallel circuit, how is the total voltage related to the voltage across each component?

• The total voltage is less than the voltage across each component.

• The total voltage is the sum of the voltages across each component.

• The total voltage is independent of the voltage across each component.

• The total voltage is equal to the voltage across each component.

What is the formula for calculating total current in a parallel circuit?

• I_total = I_1 * I_2 * I_3 * ... * I_n

• I_total = I_1 / I_2 / I_3 / ... / I_n

• I_total = I_1 + I_2 + I_3 + ... + I_n

• I_total = I_1 - I_2 - I_3 - ... - I_n

If one branch of a parallel circuit fails, what happens to the other branches?

• The other branches will short circuit.

• The other branches will draw more current.

• The other branches remain unaffected and continue to operate.

• The other branches will stop working temporarily.