Physics Paper 2 | Key Exam Concepts and Practical Applications | 2025 Summary, Exams of Physics

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'a non contact form acts on each magnet' - CORRECT ANSWER magnets aren't touching but both experience a force" "describe how to plot the magnetic field pattern of a bar magnet - CORRECT ANSWER place a compass near the north pole of the magnet and mark the direction that the compass points move the compass around the bar magnet to the other pole, marking at intervals the direction the compass points join the points up and add an arrow pointing from the north poe to the south pole" "explain the effect on the motion of a ball bearing when the switch is closed - CORRECT ANSWER closing the switch causes a current in the coil a magnetic field is created a force of attraction acts on the ball bearing so the ball bearing accelerates towards the iron nail" "force = - CORRECT ANSWER mass x acceleration" "transverse wave - CORRECT ANSWER the oscillation/ vibration is perpendicular to the direction of energy transfer" "why is it difficult to make predictions based on some hypothesises - CORRECT ANSWER they don't say how increasing or decreasing the force increases or decrease the acceleration" "list of equipment used in trolley ramp investigation - CORRECT ANSWER newton metre (force) ticker timer + tape (change in velocity and time)" "why use a sloping runway - CORRECT ANSWER reduce effect of friction on trolley" "why us the same trolley through the investigation - CORRECT ANSWER so that the mass is constant as changing the mass would change the acceleration so there is only one independent variable" "highest frequency electromagnetic - CORRECT ANSWER gamma rays" "what microwaves suitable for for sending comms to a satellite in space - CORRECT ANSWER can travel through the atmosphere" "what events lead to a neutron star forming - CORRECT ANSWER explosion of a red super giant or supernova" "1GHZ = - CORRECT ANSWER 1x10^9 HZ"