Paper 1: Advanced Physics I

Which of these is a vector quantity?

Which is the newton in SI base units?

A ball is dropped from rest. How far does it fall in 1.5 s?

A current of 0.25 A flows for 2.0 minutes. How much charge passes?

Kirchhoff's first law is a consequence of conservation of:

As the temperature of an NTC thermistor rises, its resistance:

On a force–time graph, impulse is given by:

A wheel turns at 600 revolutions per minute. What is its angular velocity?

What is the electric field strength 0.10 m from a point charge of +2.0 nC?

Which particle is a baryon?

A football is kicked at 18 m s⁻¹ at 35° above the horizontal. Calculate the horizontal and vertical components of its initial velocity.

Calculate the time of flight and the range of the ball over level ground. Ignore air resistance.

State and explain how air resistance would affect the range and maximum height.

Show that kicking the ball at 55° at the same speed gives the same range, and explain why.

An electric motor lifts a 25 kg load through 3.0 m in 6.0 s. It draws 14 A from a 12 V supply. Calculate its efficiency.

An LDR and a 10 kΩ resistor are connected in series across a 9.0 V supply. The output is taken across the LDR. The LDR's resistance is 50 kΩ in the dark and 2.0 kΩ in bright light. Calculate the output voltage in each case.

A copper wire of cross-sectional area 1.0 × 10⁻⁶ m² carries 2.0 A. Copper has 8.5 × 10²⁸ free electrons per m³. Calculate the drift velocity.

Explain why the resistance of a metal filament lamp increases as the current through it increases, but the resistance of an NTC thermistor decreases as its temperature increases.

A snooker ball of mass 0.17 kg moving at 2.0 m s⁻¹ hits an identical stationary ball. Afterwards the first ball moves at 1.0 m s⁻¹ at 60° to its original direction. Calculate the velocity of the second ball and determine whether the collision is elastic.

A 900 kg car goes round a flat bend of radius 50 m at 15 m s⁻¹. Calculate the centripetal force, and the maximum speed if the maximum friction available is 6000 N.

Two parallel plates 5.0 cm apart have a pd of 400 V. Calculate the acceleration of an electron between them.

A 470 μF capacitor is charged to 12 V and discharged through 10 kΩ. Calculate the charge stored, the energy stored and the time for the pd to halve.

Explain, using Faraday's and Lenz's laws, how a transformer works and why its core is laminated.

A 0.12 m wire carrying 4.0 A is at 30° to a uniform field of 0.080 T. Calculate the force on it.

Explain how a linear accelerator accelerates protons and why the drift tubes get longer along the accelerator.

Particle tracks are seen in a bubble chamber in a uniform magnetic field. Explain what the curvature of tracks tells you, and why some tracks spiral inwards.

The Σ⁺ baryon has quark composition uus and the π⁺ meson is ud̄. Show that both have charge +1 and state the strangeness of each.

A proton and an antiproton at rest annihilate, producing two photons. Calculate the energy and wavelength of each photon. (Proton rest energy 938 MeV)

Describe the alpha-particle scattering experiment and explain how its results led to the nuclear model of the atom.

A book rests on a table. Identify the Newton's third law pair for the book's weight and explain why weight and the normal contact force are not a third-law pair.

Water leaves a hose at 12 m s⁻¹ at a rate of 2.5 kg s⁻¹ and hits a wall, stopping. Calculate the force on the wall and explain your method.

The drag force on a car is F = ½ρCAv², where C has no units. Show that the equation is homogeneous.