A-Level Physics: AQA Year 1 & 2 Exam Practice Workbook - includes Answers: superb for the 2024 and 2025 exams (CGP AQA A-Level Physics)

Product Information

Use signal-to-noise ration = 10 lg(P1/P2) with P1 as the signal and P2 as the noise) b Calculate the minimum input signal power to the fibre. Calculating force and field strength We define electric field strength at a point in a field in terms of the force on a positive charge placed at that point. Analogue and digital signals This exercise give you practice converting between digital and analogue signals, and understanding how electronics enables these conversions.

It’s packed with ultra-realistic exam questions covering every topic students need to know, including a section of mixed (synoptic) questions. At the start of the experiment, one mass is pulled forwards and released so that it swings back and forth. Note that, although there will be an upward force on each of the car’s wheels, we can represent this as a single upward force.

a State what is meant by the other quantities in the formula and, on a copy of the diagram, mark the distances a, x and D. d Determine the density of the hydrogen and hence deduce the root mean square (rms) speed of the hydrogen molecules at 100 °C. To record one channel of audio on a DVD, a signal is sampled at a frequency of 48 kHz, and each sample is a 24-bit number. b Determine the number of amplifiers necessary along the cable for the final signal to be of the same power as the initial signal. d Explain why the temperature of the water in beaker B falls more quickly than that of the water in beaker A.

c Use your answers to parts a and b to calculate the time taken for the spacecraft to complete half an orbit, and hence find its orbital period. c In an attempt to determine g using projectile motion, a student fires a metal ball with an initial velocity of 12.Cambridge IGCSE™ and O Level Environmental Management Workbook (Cambridge International IGCSE) [Workbook ed. Any force that has a component at right angles to an object’s velocity will provide a centripetal acceleration. Identifying forces You can determine how an object will move by considering all the forces acting on it.