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Gravitational Fields · Paper 1 — Free Physics HL Practice Questions

What this topic covers

Fields is where gravity, electricity and magnetism finally get shown to be the same trick played three times: a source (mass, charge, or moving charge), a field that falls off as $1/ r^{2}$ or sits uniform between plates, and a potential that tells you the energy cost of moving through it. HL bolts on two whole subtopics that SL never sees — motion in combined electric and magnetic fields, and electromagnetic induction — and a huge fraction of the marks in this theme come from just two calculation types: transformer turns ratios and induced emf from $ΔΦ/Δ t$ . Get those automatic, then spend the rest of your revision on the sign conventions ( $V_{g}$ is always negative), the vector-vs-scalar traps ( $g$ vs $V_{g}$ , $E$ vs $V$ ), and the direction rules (Lenz's law, $q v \times B$ ) that separate a 6 from a 7.

Read the full Fields lesson notes →

1FoundationMCQGravitational force and field strength1 markPaper 1~2 min

A student of mass

60 \text{ kg}

stands stationary on a bathroom scale inside a lift. The gravitational field strength at this location is

9.8 \text{ N kg}^{-1}

. What is the magnitude of the gravitational force acting on the student?

diagram

Solutions

2FoundationMCQGravitational force and field strength1 markPaper 1~2 min

A spacecraft of mass

1500 \text{ kg}

is at a point in space where the gravitational field strength due to Earth is

0.50 \text{ N kg}^{-1}

. What is the gravitational force acting on the spacecraft?

diagram

Solutions

3FoundationMCQGravitational force and field strength1 markPaper 1~2 min

A student of mass

55 \text{ kg}

stands on a bathroom scale inside an elevator. The elevator accelerates upward at

2.0 \text{ m s}^{-2}

. The gravitational field strength is

9.8 \text{ N kg}^{-1}

. What is the reading on the scale?

diagram

Solutions

4MasteryMCQGravitational force and field strength1 markPaper 1~2 min

A mass of

0.50 \text{ kg}

is placed on a digital balance on the surface of a planet. The balance reads

2.0 \text{ N}

. What is the gravitational field strength at the surface of this planet?

diagram

Solutions

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