Oops, not sure what happened there! Thanks for letting us know; it should be fixed now,
A.2 practice: Circular motionHi Danny, there is no options in Qn 7...
A.2 practice: Circular motionHi Team - for Q7, wouldn't the electrons being spaced further apart mean their electric potential is less negative (and therefore higher)? I was probably overthinking as I was using the electric potential definition from the HL material. Perhaps to...
B5 MCQs: Current and resistanceNope, mass cannot repel. The field lines show the direction of the net force on a test mass, assuming the two shown masses are fixed in place. I think this question is correct, but maybe I'm missing something?
D1 MCQs: Gravitational fieldsGreetings Danny, Regarding Q5, can mass repel?
D1 MCQs: Gravitational fieldsAy Danny, Thank you for holding the other end of the line so amazingly, we find so much use from the site
A.2 practice: Circular motionYou're right! I've fixed that question, thanks!
A.2 practice: Circular motionGreetings. Regarding question 2. Asking for angular speed, if we multimultiply by radius and consider the dimensions, would that not be the linear velocity?
A.2 practice: Circular motionHi Shujaat, you are correct. Students do not need to know Kirchhoff's laws. However, because they need to know the implications of the laws (for current and potential difference) and because many students considering Physics in higher education would...
Teach: Kirchhoff's Laws
Danny
Site authorNot sure I follow, Benson; the potential energy in a system of two or more negative particles is positive (they repel). Is there a sign convention I am missing?
B5 MCQs: Current and resistance