Flashcards
Fields
Cards in this deck (10)
- 1Define Electric Field StrengthThe Force per unit Charge on a small positive test charge at that point in the field. Vector Quantity
- 2Why is potential divide by r not r^2?Because potential is work done to move object. Work done = Fxd and The force is r^2
- 3Define Electric potentialWork done per unit positive charge to move a positive charge from infinity to that point in the field.
- 4How to calculate escape velocity?Set Ek to Equal Gravitational potential. The kinetic energy has to overcome this potential. Solve from there,
- 5Why do rockets not need to achieve escape velocity?Add energy/fuel during flight. Do not fully escape the earths gravitational pull
- 6What is escape velocity.Velocity needed to escape earths gravitational field from surface without additional energy.
- 7What are equipotentials always perpendicular to?The electric field lines.
- 8What is an equipotential?A line at which a charge can move along without any work being done. As potential is constant.
- 9Prove T^2 proportional to r^3T ^2= (2πr)^2/v^2 as Orbit, centripetal acceleration = Magnitude of Field. V^2/r = GM/r^2. v^2 = GM/r. 2πr/GM/r == 4π r^3
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GM - 10—
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- A level Physics Flashcards on Fields, created by Sam Wallace on 01/01/2019.
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- Sam Wallace
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