Edexcel A Level Physics Paper 1: Advanced Physics I June 2017 question paper 9PH0/01

A volt can be defined as a

An object of mass m is moved from point A on the ground, to point B on a bench of height h as shown in the diagram.

Which of the following is a correct expression for the work done on the object?

A capacitor of capacitance C is charged to a potential difference V by a power supply. The energy stored on the charged capacitor is W. What would be the energy stored if the potential difference were 2V?

A light‑dependent resistor (LDR) and resistor are connected in series with a 6V battery as shown. A voltmeter measures the potential difference across the LDR.

In daylight the voltmeter reads 3.0V.

Which reading is most likely if the circuit is now in total darkness?

A circuit is set up as shown in the diagram. Lamps X and Y are identical. The coil has a soft iron core. The resistor and the coil have the same resistance.

The switch is closed and lamp X lights instantly.

Which statement best describes lamp Y after the switch is closed?

The alpha particle scattering experiment led to a number of observations and conclusions.

Which row in the table gives a correct observation and corresponding conclusion from

A sports class is studying cycling. They produce a video of a cyclist on a horizontal lawn. The cyclist starts from rest. They produce a sketch graph of the velocity v of the cyclist against time t.

Explain the shape of this graph and include a consideration of force as part of your answer.

A student makes the following statement. The work done by the cyclist is converted into the kinetic energy of the cyclist and bicycle.

Criticise this statement.

The shot put is an Olympic field event. The distance for the women’s world record shot put is in excess of twenty two metres.

The shot is a metal ball, which is thrown from a standing position so that it lands on the ground a horizontal distance R away from the thrower.

A shot is thrown from a height h above the ground with an initial velocity of 14.2 m s^–1 at an angle of 37.0° to the horizontal. The time it takes for the shot to reach the ground is 1.98 s.

Show that the vertical component of the initial velocity is about 8.6 m s^–1.

Calculate the height h above the ground from which the shot was thrown.

Calculate the horizontal distance R for this throw.

Proton beam therapy is being introduced in the UK as a new cancer treatment.

A beam of protons is accelerated by a cyclotron to an energy of 23 MeV and is then focused onto a tumour.

*(a) Explain how the cyclotron produces the high‑energy proton beam.

Conventional treatment may use X‑rays to deliver energy to a tumour.

The graph shows the variation of energy delivered with penetration below the skin for a beam of protons and a beam of X‑rays.

Deduce why the beam of protons could be a more effective treatment for tumours than a beam of X‑rays.

Developing new cancer treatments is expensive.

Give two possible reasons why money should be provided for the development of this new cancer treatment.

Some liquids conduct electricity. This property can be used to pump these liquids through pipes.

A short section of a rectangular pipe containing a liquid is shown in the diagram. The pipe is placed in a magnetic field of flux density B and a current I is passed through the liquid as shown.

Add an arrow to the diagram above to show the direction in which the liquid will move.

A practical demonstration of this principle used two rectangular electrodes, opposite each other on either side of the pipe, a distance of 0.60 mm apart. The dimensions of the electrodes are shown in the diagram.

The electrodes were connected to a 1.5 V cell. Salt water was pumped using a magnetic field of magnetic flux density 0.40 T.

Show that the current through the salt water is about 20 mA.

resistivity of salt water = 1.6 Ω m

Hence calculate the force on the salt water.

A circuit consists of a battery of e.m.f. 5 V and negligible internal resistance, a switch, a 100 Ω resistor and an uncharged 50 µF capacitor.

Describe what happens to the potential difference across the resistor and the potential difference across the capacitor after the switch is closed.

The neutral lambda Λ⁰ particle is a baryon of mass 1116 MeV/c² and contains one strange quark.

The table shows quarks and their relative charge.

State, with justification, the quark content of a Λ⁰ particle.

Calculate the mass of the Λ⁰ particle in kg.

A student suggests five ways a Λ⁰ particle might decay. These are

Deduce which of these decay processes are not possible.

Lambda particles were first detected in experiments which made use of cosmic rays entering the atmosphere. Cosmic rays are mainly high‑energy protons which have a mass less than that of a lambda particle.

Explain why a cosmic ray could lead to the creation of a lambda particle.

The Λ⁰ particle cannot be directly observed in particle experiments, however some of the decay products can.

Explain why the Λ⁰ particle cannot be directly observed but information about it can be obtained by studying its decay particles.

A student investigates the motion of a friction‑free trolley down a ramp. On the top of the trolley there is a metal loop which makes contact with a length of thin resistance wire, AB, fixed above the ramp. The resistance wire has a uniform diameter.

The trolley accelerates down the ramp and the metal loop stays in contact with the wire along the full length of the ramp.

The student uses a protractor to measure the angle θ between the ramp and the horizontal

and records a value of 4° with an uncertainty of ±1°.

The two ends of the wire are connected to a 1.5 V cell. A data logger, set to measure potential difference, is connected to the metal loop and to the negative terminal of the cell.

Explain how the potential difference recorded by the data logger will vary as the loop moves along the length of the wire AB.

The graph shows the data obtained from the data logger.

Determine the velocity of the trolley at 1.5 s.

1.5 V represents a distance of 2.00 m.

The student calculated the velocity of the trolley at 2.0 s to be 1.5 m s^–1.

By considering the acceleration of the trolley, determine whether the student’s measurement of θ was within the uncertainty quoted.

Motors usually have a rotating component which can do work W.

In the diagram below, electric field lines have been drawn around one pair of these spheres.

Add to the diagram to show • the directions of the field lines • the lines of equipotential.

The distance between the centres of each charged sphere in this pair is 5.0 cm.

Show that the force between this pair of charged spheres is about 0.04 N.

charge on each sphere = 0.10 μC

The table shows the typical power and the corresponding angular velocity required for three different appliances.

Deduce which of these appliances, in principle, could use the electrostatic motor in (b).

You should use the word equation in (a) and assume that the length of the rod in the electrostatic motor is 8.0 cm.

Assume that the electrostatic motor would deliver a constant force throughout one complete rotation.