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.

 

 

 

 

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.

Solutions for practical Paper 5 variant 1 Question 2 May/June 2019 Cambridge A Level Physics.