Physics Syllabus (Adapted from Singapore Examinations and Assessment Board)

The physics tuition will be conducted in accordance to the Physics Syllabus. 

 

22.  Electromagnetic Induction

 

Content

•      Principles of electromagnetic induction

 

•      The a.c. generator

 

•      Use of cathode-ray oscilloscope

 

•      The transformer Learning Outcomes Candidates should be able to:

(a)   deduce from Faraday’s experiments on electromagnetic induction or other appropriate experiments: (i)   that a changing magnetic field can induce an e.m.f. in a circuit

(ii)   that the direction of the induced e.m.f. opposes the change producing it

(iii)  the factors affecting the magnitude of the induced e.m.f.

 

(b)   describe a simple form of a.c. generator (rotating coil or rotating magnet) and the use of slip rings

(where needed)

 

(c)   sketch a graph of voltage output against time for a simple a.c. generator

 

(d)   describe  the  use  of  a  cathode-ray  oscilloscope (c.r.o.)  to  display waveforms  and  to  measure potential differences and short intervals of time (detailed circuits, structure and operation of the c.r.o. are not required)

 

(e)   interpret c.r.o.  displays  of  waveforms,  potential differences and time  intervals  to  solve  related problems

 

(f)    describe the structure and principle of operation of a simple iron-cored transformer as used for voltage transformations

 

(g)   recall and apply the equations VP / VS = NP / NS and VPIP  = VSIS  to new situations or to solve related problems (for an ideal transformer)

 

(h)   describe the energy loss in cables and deduce the advantages of high voltage transmission