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The first law is that an object will remain at a constant velocity or stationary (which is just a constant velocity of zero) unless acted upon by an external force.

Once acted upon by thi...

This is a past exam question from an A level paper for OCR Physics B.We know that in one second, a volume of water (V), travelling at 2.5 m/s is passing through an area of 500 metres squared in one second...

To answer this question you must use the magnetic field "Right Hand Rule". We know that if a charged particle enters a magnetic field it will experience a force ​perpendicular to both​ ...

To understand this question, it is important to know that velocity has both a direction and a magnitude. The magnitude can be expressed by the unit m/s, however the direction is expressed by a vector. ...

The alternating current creates an alternating magnetic field across the transformer. A magnetic field develops in the iron core of the transformer. This causes a potential difference to be induced acr...