A Level Physics Practice Exam

Which fundamental forces can electrons experience?

1. Only electromagnetic

2. Only weak interaction

3. Weak and strong

4. Weak, electromagnetic, and gravitational

The correct answer is: Weak, electromagnetic, and gravitational

Electrons are fundamental particles that interact through several fundamental forces. The correct answer highlights that electrons can experience weak, electromagnetic, and gravitational forces. The electromagnetic force acts on electrons because they carry electric charge. This force is responsible for the interactions between charged particles, allowing electrons to participate in chemical bonding and electromagnetic radiation. Additionally, electrons also experience weak interactions. These interactions are essential in certain types of particle decays and processes, such as beta decay, wherein an electron is emitted from a neutron as it transforms into a proton. Lastly, electrons are affected by the gravitational force. While this force is significantly weaker compared to the other two, it still influences all particles with mass, including electrons. In summary, the combination of weak, electromagnetic, and gravitational forces encapsulates the range of interactions that electrons undergo, making the selected answer comprehensive and accurate in terms of the fundamental forces relevant to electrons.