9702/35/O/N/20:
Lab report sample for October/November 2020 Paper 3 Variant 5 Question 2.
October 3, 2020
ON20 P35 Q1 Sample Lab Practical
9702/35/O/N/20:
Sample lab report for October/November 2020 Paper 4 Variant 5 Question 1.
Also known as 9702w20qp35
October 1, 2020
June 5, 2020
MJ20 P52 Q2 Viscosity of Liquid
9702/52/M/J/20: A student investigates how the viscous force in a liquid varies with temperature.
The student releases a ball from the surface of the liquid in a container. The ball falls as shown in
Fig. 2.1. The student determines the speed of the ball between P and Q and measures the thermodynamic
temperature T of the liquid.
Viscosity is a term used to describe the viscous forces acting in a liquid. Viscosity has the unit
pascal second (Pas). The viscosity η of the liquid is calculated from the speed of the ball. The experiment is repeated for the same liquid at different temperatures. It is suggested that η and T are related by the equation
\( \eta = He^{\frac{E}{kT}}\)
where E and H are constants and k is the Boltzmann constant.
May/June 2020 Paper 5 Variant 2 Questions 2 data analysis.
MJ20 P51 Q2 Discharging Capacitor
9702/51/M/J/20: A student investigates the discharge of a capacitor through a resistor using the circuit shown in Fig. 2.1. The student initially closes the switch and charges the capacitor. The switch is then opened and a stop-watch is started. The capacitor discharges through the resistor. At time t the potential
difference V across the capacitor is measured.
It is suggested that V and t are related by the equation where Q0 is the charge of the fully charged capacitor, C is the capacitance of the capacitor and R is the resistance of the resistor.
May/June 2020 Paper 51 Question 2.
May 1, 2020
MJ20 P12 Worked Solutions
9702/12/M/J/20: Full video playlist here:
March 5, 2020
FM20 P52 Q2 Capacitor Discharge
9702/52/F/M/20: A student investigates the discharge of a capacitor through a resistor as shown in Fig. 2.1. The student initially closes the switch and charges the capacitor. The switch is then opened and a stop-watch is started. The capacitor discharges through the resistor. At different times t the current I is measured. It is suggested that I and t are related by the equation
\( I = \dfrac{E}{R} e^{-\frac{t}{RC}}\)
where E is the e.m.f. of the power supply, C is the capacitance of the capacitor and R is the resistance of the resistor.
November 5, 2019
ON19 P52 Q2 Resistance of LDR
9702/52/O/N/19: A student is investigating how the resistance of a thermistor varies with temperature. The thermistor is placed in water, as shown in Fig. 2.1.
The thermistor is connected to a battery with electromotive force (e.m.f.) E and negligible internal resistance. The current I in the thermistor is measured. The resistance R of the thermistor is then determined using the expression R = E/I.
The experiment is repeated for different temperatures of the water.It is suggested that the resistance R of the thermistor and the thermodynamic temperature T are related by the equation R = pT^q where p and q are constants
ON19 P51 Q2 Period of Spring
9702/51/O/N/19: A student is investigating the oscillations of a mass attached to two springs connected in series, as shown in Fig. 2.1.
October/November 2019 Physics Paper 5 Variant 1 Questions 2 of A Level Practical.
June 5, 2019
MJ19 P51 Q2 Variable Resistor
9702/51/M/J/19: A student is investigating a rotary variable resistor, as shown in Fig. 2.1. The variable resistor is connected to a battery of electromotive force (e.m.f.) E and negligible internal resistance, as shown in Fig. 2.2.
The student uses a protractor to measure the angle θ through which the spindle of the variable resistor is rotated and records the current I. The experiment is repeated for different angles. It is suggested that I and θ are related by the equation E = IKθ where K is a constant.
November 5, 2018
ON18 P51 Q2 Charge on Sphere
9702/51/O/N/18: A student is investigating the electric potential near a charged metal sphere. The sphere is suspended from the ceiling as shown in Fig. 2.1.
A flame probe is used to measure the potential V at a distance L from the surface of the sphere. The experiment is repeated for different distances from the sphere. It is suggested that V and L are related by the equation
\(V = \dfrac{Q}{4 \pi \epsilon_0 0(L + a)}\)
where Q is the charge on the sphere, a is the radius of the sphere and ε0 is the permittivity of free space.
Solutions for October/November 2018 Paper 5 variant 1 question 2 data analysis.
March 5, 2018
FM18 P52 Q2 Double Slit Interference
9702/52/F/M/18: A student is investigating monochromatic light passing through a double slit. Bright and dark fringes are produced on a screen as shown in Fig. 2.1.
The distance w between 10 bright fringes is measured. The fringe spacing P between neighbouring bright fringes is then determined.
The experiment is repeated for light of different wavelengths \(\lambda \).
It is suggested that the fringe spacing P and the wavelength \(\lambda \). are related by the equation
\(\dfrac{P}{D} = \frac{\lambda}{s} \)
where D is the distance from the double slit to the screen and s is the slit separation.
Paper 5 variant 2 Question 2 February/March data analysis with gradient, y-intercept, and uncertainty.
November 5, 2017
ON17 P52 Q2 Standing Waves
9702/52/O/N/17: A student is investigating stationary waves on a stretched elastic cord. A vibrator attached to the cord is connected to a signal generator. The apparatus is set up as shown in Fig. 2.1.
The mass M attached to the cord is adjusted until resonance is obtained. The number n of antinodes on the stationary wave is recorded. The experiment is repeated with different masses to obtain different values of n. It is suggested that M and n are related by the equation
\(f = \dfrac{n}{2L} \sqrt{\dfrac{Mg}{\mu}} \)
where f is the frequency of the vibrator, g is the acceleration of free fall, L is the length of the elastic cord and n is the mass per unit length of the elastic cord.
October/November 2017 Paper 5 Variant 2 Question 2 data analysis.
ON17 P51 Q2 Force on Bridge
9702/51/O/N/17: A student is investigating how the forces acting on a bridge vary as the position of a load on the bridge is changed. The bridge is modeled as shown in Fig. 2.1 with two newton-meters providing the support forces.
A load of mass m is placed at a distance x from support A. The readings of the newton-meters T1 and T2 are recorded for different values of x.
It is suggested that T1, T2 and x are related by the equation
\( T_1 - T_2 = \dfrac{mg(s - x) - mgx}{s} \)
where s is the separation of the newton-meters and g is the acceleration of free fall.
Oct/Nov 2017 Paper 5 Variant 1 Questions 2 data analysis.
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