Computer Shopper 125/Computer Shopper CD-ROM Issue 125 (1998-07)(Dennis Publishing).iso/EuroPhys/Database/Electric/exam/Script/Aexam2.exm

Text File | 1997-11-10 | 4.6 KB | 235 lines

@data Costly Kilowatts
@examPages question,question,checklist,checklist,answer
@more 1,5
@page 1
@AtGraphic 144,41
@picture elefh4b1.bmp
@At 97,12
#f4A gardener wanted to buy a heater for a greenhouse.  Two electric heaters are on sale.
@At 216,129
#f4#bA#b
@At 481,133
#bB#b
@At 147,145
250 volts, 1 kilowatt (or 1000 watts)
@At 406,147
250 volts, 2 kilowatts (or 2000 watts)
@At 92,170
#b1.#b #^#bHeater B#b is used for 4 hours.
@at ,+4
#tCalculate how many kilowatt-hour would be used.
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160  [3]
@at ,+8

#b2.#b Each kilowatt-hour costs 7 pence.
@at ,+4
#tCalculate the cost of using #bheater B#b for 4 hours.
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160  [3]
@prompt



@more 2,5
@page 2
@AtGraphic 161,35
@picture elefh4b1.bmp
@At 97,12
#f4A gardener wanted to buy a heater for a greenhouse.  Two electric heaters are on sale.
@At 216,129
#f4#bA#b
@At 481,133
#bB#b
@At 147,145
250 volts, 1 kilowatt (or 1000 watts)
@At 406,147
250 volts, 2 kilowatts (or 2000 watts)
@At 92,170
#b3.#b #^Calculate the current flowing in heater B when used normally.
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160  [3]
@at ,+8
#b4.#b Which heater has most resistance?  Explain your answer.
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160  [4]
@prompt







@more 3,5
@page 3
@At 100,370
#f4#cr#bClick on the answers you wrote down for each section of this question.
@AtGraphic 161,35
@picture elefh4b1.bmp
@At 97,12
#f4A gardener wanted to buy a heater for a greenhouse.  Two electric heaters are on sale.
@At 216,129
#f4#bA#b
@At 481,133
#bB#b
@At 147,145
250 volts, 1 kilowatt (or 1000 watts)
@At 406,147
250 volts, 2 kilowatts (or 2000 watts)
@At 92,170
#b1.#b #^#bHeater B#b is used for 4 hours.
@at ,+4
#tCalculate how many kilowatt-hours would be used.
@at ,+4
#t#%  Kilowatt-hours used          = kilowatts ╫ hours#%#v160  [1]
@at ,+4
#ox#t#%  2 ╫ 4#%#v160  [1]
@at ,+4
#ox#t#%  = 8#%#v160  [1]
@at ,+8
@savePos 1
@At 237,206
#ox
@restorePos 1

#b2.#b Each kilowatt-hours costs 7 pence.
@at ,+4
#tCalculate the cost of using #bheater B#b for 4 hours.
@at ,+4
#t#%  Cost        = (kilowatt-hours) ╫ (cost per kilowatt)#%#v160  [1]
@at ,+4
#ox#t#%  8 ╫ 7p#%#v160  [1]
@at ,+4
#ox#t#%  56p#%#v160  [1]
@At 147,300
#ox
@prompt




@more 4,5
@page 4
@At 100,370
#f4#cr#bClick on the answers you wrote down for each section of this question.
@AtGraphic 161,35
@picture elefh4b1.bmp
@At 97,12
#f4A gardener wanted to buy a heater for a greenhouse.  Two electric heaters are on sale.
@At 216,129
#f4#bA#b
@At 481,133
#bB#b
@At 147,145
250 volts, 1 kilowatt (or 1000 watts)
@At 406,147
250 volts, 2 kilowatts (or 2000 watts)
@At 92,170
#b3.#b #^Calculate the current flowing in heater B when used normally.
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160  [3]
@at ,+8
#b4.#b Which heater has most resistance?  Explain your answer.
@at ,+4
#t#%  #bHeater A#b           Obtain resistance from V = IR, but first need to calculate I.#%#v160  [1]
@at ,+4
#t#v160
@at ,+4
#t#v160  [2]
@at ,+4
#t#v160
@at ,+4
#t#v160  [1]

@At 111,207
#%#<Power = volts ╫ current          P = V ╫ I                #f8#b\#b#f1#f4    I =#> #^#uP#u #< =#> #u#^2000#u watts   #<=          8 amps#>#%
#%#tV #t 250 volts#%
@At 337,215
#ox
@At 250,214
#ox
@At 505,216
#ox



@At 108,283
#%#<From P = V ╫ I        #b#f8 #f1#f4#b I = #>#u#^P#u  #<=#>  #uI#^000#u   #<= 4 A#>#%
#%#tV         #t250#%

@At 354,283
#%#<#b#f\#fI#f4#b from V = lR     R =#> #^#uV#u   #<= #>  #u2#^50#u    #<= 62.5 ohms#>#%
#%#t I#t4#%

@At 112,319
#%#bHeater B#b        #<R = #> #^#uV#u #< = #>#u2#^50#u#<     = 31.25 ohms       #b#f8\#f1#f4#b Heater A has most resistance.#>#%
#%#t I         #t8#%


@At 171,327
#ox
@At 341,292
#ox
@At 193,293
#ox
@At 171,265
#ox
@prompt


@more 5,5
@page 5
@At 260,59
You scored #z4 out of #z5.
@At 253,111
This is a grade #z6

@iffailedGrade
@At 95,152
You did not get the grade you were hoping for. It is recommended that you
study the following:

@At 225,195
#bModule  #^:#b #^Electricity and Magnetism
#bSection#t:#b Mains Electricity
#bArea#t:#b Charging for electricity
#bArea#t:#b Calculations
@at ,+8
#bSection#t:#b Resistance in circuits
#bArea#t:#b What is resistance
#bArea#t:#b Types of resistor
#bArea#t:#b Behaviour of resistors
@At 156,338
#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