Quiz Vật Lí Tốt Nghiệp THPT 2025

When the absolute temperature of an ideal gas doubles, what happens to the average kinetic energy of the gas molecules?

• doubles

• reduces by half

• remains unchanged

• increases by four times

A fixed coil and a test magnet are arranged as shown. When the switch K is closed, what happens to the test magnet?

• is pushed by the coil

• is attracted and then pushed by the coil

• is attracted by the coil

• remains still

The process of a substance changing from solid to liquid is called what?

• condensation

• melting

• vaporization

• freezing

The process of a fixed mass of gas changing state while keeping the volume constant is called what?

• isothermal

• isometric

• thermal equilibrium

• isobaric

The magnetic field is a form of matter that exists in space and what?

• exerts electric force on charges placed in it

• exerts magnetic force on magnets and currents placed in it

• exerts attractive force on objects placed in it

• exerts repulsive force on objects placed in it

When two objects with a temperature difference come into contact, thermal energy is transferred from?

• the object with a higher temperature to the one with a lower temperature

• the larger object to the smaller object

• the smaller object to the larger object

• the object with a lower temperature to the one with a higher temperature

The correct steps to measure the temperature of an object are as follows: (1) Measure the temperature; (2) Estimate the temperature of the object; (3) Calibrate the thermometer; (4) Choose the appropriate thermometer; (5) Read and record the measurement. What is the correct order?

• (3), (2), (4), (1), (5)

• (1), (2), (3), (4), (5)

• (1), (4)

What are the correct steps to measure the temperature of an object?

• (3), (2), (4), (1), (5).

• (1), (2), (3), (4), (5).

• (1), (4), (2), (3), (5).

• (2), (4), (3), (1), (5).

Which of the following quantities characterizing alternating current has an effective value?

• Frequency.

• Power.

• Period.

• Voltage.

Electromagnetic waves

• cannot propagate in a vacuum.

• have electric and magnetic field components oscillating in the same direction at a point.

• are electromagnetic fields propagating in space.

• are longitudinal or transverse waves.