Computer Shopper 125/Computer Shopper CD-ROM Issue 125 (1998-07)(Dennis Publishing).iso/EuroPhys/Database/Electric/exam/Script/Aexam3.exm

Text File | 1997-07-29 | 3.5 KB | 128 lines

@data Magnets and Coils
@examPages question,checklist,answer
@more 1,3
@page 1
@AtGraphic 453,12
@picture elefh5a1.bmp
@At 90,12
#f4The diagram below shows a magnet and a coil. The coil is
connected to a sensitive ammeter (galvanometer) which has
a centre-zero scale. When the north pole of the magnet is #bmoved
towards the coil#b, the meter deflects to the right.

@At 90,89
#b1.#b #^If the magnet #bonly#b can be moved or changed, suggest two different ways of producing
@at ,+4
#t#ba.#b a larger deflection           #^First way           #^#v90 [1]
@at ,+4
#t#tSecond way #t#v90 [1]
@at ,+8
#t#bb.#b a reversed deflection#tFirst way #t#v90 [1]
@at ,+4
#t#tSecond way #t#v90 [1]
@at ,+8

#b2.#b State and explain what deflection you would expect if the magnet was at rest inside the coil.
@at ,+4
#t#v168
@at ,+4
#t#v168
@at ,+4
#t#v168  [3]
@at ,+8
#b3.#b When the north pole of the magnet moves towards the coil, the end of the coil nearest the
#tmagnet behaves as a north pole.
@at ,+4
#tExplain why.
@at ,+4
#t#v168
@at ,+4
#t#v168  [2]
@prompt




@more 2,3
@page 2
@At 100,370
#f4#cr#bClick on the answers you wrote down for each section of this question.
@AtGraphic 453,12
@picture elefh5a1.bmp
@At 90,12
#f4The diagram below shows a magnet and a coil. The coil is
connected to a sensitive ammeter (galvanometer) which has
a centre-zero scale. When the north pole of the magnet is #bmoved
towards the coil#b, the meter deflects to the right.

@At 90,89
#b1.#b #^If the magnet #bonly#b can be moved or changed, suggest two different ways of producing
@at ,+4
#t#ba.#b a larger deflection           #^First way           #^#%  #f5Stronger magnet#f4#%#v90 [1]
@at ,+4
#t#tSecond way #t#%  #f5Faster movement of the magnet#f4#%#v90 [1]
@at ,+8
#t#bb.#b a reversed deflection#tFirst way #t#%  #f5Reverse the magnet, i.e. south pole enters the coil#f4#%#v90 [1]
@at ,+4
#t#tSecond way #t#%  #f5Pull the magnet out of the coil#f4#%#v90 [1]
@at ,+8

#b2.#b State and explain what deflection you would expect if the magnet was at rest inside the coil.
@at ,+4
#ox#t#%  #f5There would be zero deflection if the magnet was at rest.#f4#%#v168  [1]
@at ,+4
#ox#t#%  #f5No current would be generated in the coil unless lines of magnetic field are moving and cutting the coil.#f4#%#v168  [1]
@at ,+4
#ox#t#%  #f5This will not happen if the magnet is not moving.#f4#%#v168  [1]
@at ,+8
#b3.#b When the north pole of the magnet moves towards the coil, the end of the coil nearest the
#tmagnet behaves as a north pole.
@at ,+4
#tExplain why.
@at ,+4
#ox#%  #f5The current generated or induced in the coil is always set up to oppose the change causing it.#f4#%#t#v168  [1]
@at ,+4
#ox#%  #f5Like poles (N and N in this case) repel.#f4#%#t#v168  [1]
@At 317,167
#ox
@At 316,148
#ox
@At 316,128
#ox
@At 316,109
#ox
@prompt







@more 3,3
@page 3
@At 260,59
You scored #z4 out of #z5.
@At 253,111
This is a grade #z6

@iffailedGrade
@At 98,173
You did not get the grade you were hoping for. It is recommended that you
study the following:

@At 229,214
#bModule  #^:#b #^Electricity and Magnetism
#bSection#t:#b Electromagnetic Induction
#bArea#t:#b What is electromagnetic induction
#bArea#t:#b Using electromagnetic induction
#bArea#t:#b Alternators
@At 167,324
#crClick on Forward to return to the exam selection menu.
@endif
'@At 100,370
'#f4#cr#bClick on the answers you wrote down for each section of this question.
@prompt