questions=new Array(); questions[0]=new Array(); //Question 1 definition questions[0][0]="A current of 2.5 A flows in a 20 ohm load. What power will be dissipated?"; //Question text questions[0][1]=" 40 W"; //Answer option no.1 questions[0][2]=" 50 W"; //Answer option no.2 questions[0][3]=" 125 W"; //Answer option no.3 questions[0][4]="3"; questions[1]=new Array(); //Question 2 definition questions[1][0]="In an a.c. circuit the phase angle is 45°. This means that:"; //Question text questions[1][1]=" the resistance and reactance are equal"; //Answer option no.1 questions[1][2]=" the resistance is equal to the impedance"; //Answer option no.2 questions[1][3]=" the resistance is equal to half the impedance."; //Answer option no.3 questions[1][4]="1"; questions[2]=new Array(); //Question 3 definition questions[2][0]="A capacitance of 100µF connected to a resistance of 5 Mohm will have a time constant of:"; //Question text questions[2][1]=" 20 s"; //Answer option no.1 questions[2][2]=" 50 s"; //Answer option no.2 questions[2][3]=" 500 s"; //Answer option no.3 questions[2][4]="3"; questions[3]=new Array(); //Question 4 definition questions[3][0]="The inductance of a coil can be increased by using:"; //Question text questions[3][1]=" a low permeability core"; //Answer option no.1 questions[3][2]=" a large number of turns"; //Answer option no.2 questions[3][3]=" wire having a low resistance."; //Answer option no.3 questions[3][4]="2"; questions[4]=new Array(); //Question 5 definition questions[4][0]="An sine wave has a peak value of 50 V. What is its r.m.s. value?"; //Question text questions[4][1]=" 35.35 V"; //Answer option no.1 questions[4][2]=" 70.71 V"; //Answer option no.2 questions[4][3]=" 141.14 V"; //Answer option no.3 questions[4][4]="1"; questions[5]=new Array(); //Question 6 definition questions[5][0]="A simple high-pass L-C filter would have:"; //Question text questions[5][1]=" L in series and C in parallel"; //Answer option no.1 questions[5][2]=" C in series and L in parallel"; //Answer option no.2 questions[5][3]=" both L and C in series."; //Answer option no.3 questions[5][4]="2"; questions[6]=new Array(); //Question 7 definition questions[6][0]="The periodic time of a 50 Hz a.c. supply is:"; //Question text questions[6][1]=" 20 ms"; //Answer option no.1 questions[6][2]=" 25 ms"; //Answer option no.2 questions[6][3]=" 50 ms."; //Answer option no.3 questions[6][4]="1"; questions[7]=new Array(); //Question 8 definition questions[7][0]="Carbon brushes fitted to a generator should have:"; //Question text questions[7][1]=" low resistance and low coefficient of friction"; //Answer option no.1 questions[7][2]=" low resistance and high coefficient of friction"; //Answer option no.2 questions[7][3]=" high resistance and low coefficient of friction."; //Answer option no.3 questions[7][4]="1"; questions[8]=new Array(); //Question 9 definition questions[8][0]="The output of a generator can be controlled by:"; //Question text questions[8][1]=" varying the armature current"; //Answer option no.1 questions[8][2]=" varying the field current"; //Answer option no.2 questions[8][3]=" varying the armature voltage."; //Answer option no.3 questions[8][4]="2"; questions[9]=new Array(); //Question 10 definition questions[9][0]="Which one of the following materials is suitable for the core of a power transformer?"; //Question text questions[9][1]=" carbon fibre"; //Answer option no.1 questions[9][2]=" phosphor bronze"; //Answer option no.2 questions[9][3]=" laminated steel."; //Answer option no.3 questions[9][4]="3"; document.write("

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