Internal resistance

Y12 Wave Questions

Maximum of 2 marks for correctly identifying the 4 errors OR stating the 2
correct notes:

i.e. errors in notes 1, 2, 3, and 6 (shown anywhere)                                                     B2

{5 or 6 or 2 or 1 notes nominated scores ZERO, 4 correct scores 2, 3 correct scores 1}

Valid corrections score 1 mark each: do not allow “NOT” corrections apart
from note 3

Note 1: In longitudinal waves vibrations are parallel to wave direction (WTTE)           B1

          {OR in transverse waves vibrations are perpendicular to wave
direction (WTTE}

Note 2 light (or any of the em waves) can travel through a vacuum (WTTE)                 B1

          {allow sound/longitudinal waves cannot travel thro’ a vacuum}

Note 3: waves carry energy/disturbance (not displacement or info)
            from…. (WTTE)                                                                                           B1

          {allow “waves do not carry the medium” and “the medium carries
the waves from…….”}

Note 6: wavelength = distance from crest to crest/trough to trough/max
                to max (WTTE)   

Transformers markscheme

Rotating coil markscheme

Lenz's Law falling magnet