2017 Waec Gce Physics Practical Runz - Physics Practical Questions & Answers Free Expo

2017 Waec Gce Physics Practical Runz - Physics Practical Questions & Answers Free Expo

2017 Waec Gce Physics Practical Runz - Physics practical chokes are now available ,but we shall post it free here when its 30minutes to finish exam in the hall.

                                               

2017 Waec Gce Physics Practical Runz - Physics Practical Questions & Answers Free Expo

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     Here is the timetable for Today's exam.

 Subjects for Wednesday, 27th September, 2017

Physics 3 (Alternative to Practical Work) >> 9.30am – 12.15pm

Foods and Nutrition 2 (Essay) >> 2.00pm – 3.15pm

Foods and Nutrition 1 (Objective) >> 3.15pm – 4.15pm

Building Construction 3 (Building Drawing and Essay) >> 2.30pm – 5.00pm

2017 Waec Gce Physics Practical Runz  Will Be Posted Here!

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2017 waec gce physics practical runz solution

Q1ix) 

the two precautions are: 1avoid parallax error in reading clock/weight balance. 2 I ensue repeated readings are taken to avoid random error. 3 I avoid draught or wind when performing the experiment.

 Q1bi)

the forces are weight, upthrust and viscous force / drag or liquid friction.

 Q1bii)

 the amplitude of oscillation of the loaded test tube decreases with time because of the viscous drag(force) which opposes the motion.

(1ai)

Real values of masses(msi)g

msi=50.0

ms2=52.5

ms3=54.5

ms4=58.0

ms5=60.0

Real values of di(cm)

d1=5.50

d2=5.80

d3=6.00

d4=6.30

d5=6.60

(1aii)

Real values of ti(secs)

t1=6.45

t2=6.80

t3=6.85

t4=7.40

t5=7.45

(1aiii)

Real values of mli(g)

ml1=>msi-mso=50-20=30

ml2=>ms2-mso=52.5-20=32.5

ml3=>ms3-mso=54.5-20=34.5

ml4=>ms4-mso=58.0-20=38.0

ml5=>ms5-mso=60.0-20=40.0

(1aiv)

TABULATE

i:1,2,3,4,5

msi(g):50.0,52.5,54.5,58.0,60.0

di(cm):5.50,5.80,6.00,6.30,6.60

ti(s):6.45,6.80,6.85,7.40,7.45

mli(g):30.0,32.5,34.5,38.0,40.0

(1aix) 

(i) I avoided parallax error in reading clock/weight balance

(ii) I ensue repeated readings are taken to avoid random error 

(1bi)

(i) weight

(ii) upthrust

(iii) viscous force/drag or liquid friction

(1bii)

The amplitude of oscillation of the loaded test tube decreases with time because of the viscous drag(force) which opposes the motion.

Question 2

b(ii)  given : f = 10cm

                     u = 20cm

                     v = ?

        Using: 

        1/f  =  1/u  +  1/v

        1/10  =  1/20  +  1/v

        Multiplying through with 20v, we have:

        2v = v + 20

        2v - v = 20

        v = 20cm

        Magnification, m = v/u

                                  m = 20/20

                                  m = 1

Question 3
(i)  Temperature increases the rate of vibration of the 
      of the molecules of the conductor and consequently a displacement in their mean position causing expansion. When this happens, the length of of the conductor tends to increase. Since the resistance of a conductor is directly proportional to its length, resistance increases.

(ii)  Given: Power, P = 1000W
                   Voltage, V = 200V
                   Resistance, R = ?
       Using:
                   P = V²/R
                   R = V²/P
                   R = 200²/1000
                   R = 40000/1000

                   R = 40 ohms

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