Physics Past Questions

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103 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

103 questions
Question 1 of 20 103 total questions
Question 1
waec 1995
Which of the following is used for shielding radioactive fall-outs?
APlastic
BWood
CTextile
DAluminium
ELead
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Question 2
waec 1995
Which of the following cannot be explained by the molecular theory of matter?
AConduction
BRadiation
CConvection
DEvaporation
EExpansion
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Question 3
waec 1995
Which of the following is not a product of nuclear fission?
AAlpha particle
BBeta particle
CGamma ray
DX-ray
ENeutron
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Question 4
waec 1995
Which of the following are emitted from a radioactive substance without altering either the nucleon number or the proton number of the substance?
AProtons
BNeutrons
CGamma rays
DBeta particles
EAlpha particles
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Question 5
waec 1995

A moving-coil meter with an internal resistance of 100 Ω has a full-scale deflection when a current of 10 mA flows through it. What value of resistance would convert it to read 10 V at full-scale deflection?

A20
B100
C600
D900
E1000
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Question 6
waec 1995
A radioactive nuclide of mass 6.09 has a half-life of 8 days. Calculate the time during which 5.25g of the nuclide would have decayed
A1 day
B2 days
C8 days
D24 days
E42 days.
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Question 7
waec 1995

Which of the following statements are not true of a moving-coil milliammeter? I. It can be used to measure alternating current II. It has a linear scale III. It can be adapted to read higher values of currents IV. A resistor connected in parallel with the milliammeter would convert it to a voltmeter

AI and IV only
BII and III only
CIII and IV only
DI, II and III only
EI, III and IV only
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Question 8
waec 1995
A cell of e.m.f 1.5V and internal resistance 2.552 is connected in series with an ammeter resistance 0.50 and a load of resistance 7.00. Calculate the current in the circuit
A0.15A
B0.20A
C2.1OA
D3.00A
E6.67A
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Question 9
waec 1995
Which of the following is a wind instrument?
AGuitar
BOrgan
CViolin
DPiano
EHarp
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Question 10
waec 1995

Calculate the current in the 30 resistor in the diagram above if the battery is of negligible internal resistance

A0.3A
B0.4A
C1.0A
D1.5A
E2.5A
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Question 11
waec 1995
What is the potential difference between X and Y in the diagram above if the battery is of negligible internal resistance
A12.5V
B5.8V
C5.0V
D3.0V
E2.0V
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Question 12
waec 1995
An alternating current, having the waveform shown in the diagram above, is represented by the equation x = Xo sinwt. Which of the following represents Xo?
AOS
BOR
CPQ
DRT
EOT
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Question 13
waec 1995
Calculate the quantity charge flowing through a conductor if a current of 10A passes through the conductor for 10s.
A100C
B20C
C15C
D10C
E1C
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Question 14
waec 1995
The effective capacitance between points X and Y in the diagram below is 1.0μF, What is the value of the capacitance C, measured in micro-farad?
A5.0μF
B4.0μF
C3.0μF
D1.0μF
E0.5μF
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Question 15
waec 1995

The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage applied across its terminals?

A4000V
B200V
C16V
D6V
E4V
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Question 16
waec 1995

A capacitor of capacitance 25μF is connected to an a.c. power source of frequency 200 Hz. Calculate the reactance of the capacitor

A0.01
B0.02
C50.00
D100.00
E200.00.
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Question 17
waec 1995

If the current in the resistor R in diagram above is 0.05A, calculate the p.d. across the inductor.

A2.5V
B25.0V
C49.0V
D50.0V
E250.0V
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Question 18
waec 1995
Calculate the inductive reactance of the circuit shown above.
A50.00
B5.00
C0.50
D0.05
E0.02
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Question 19
waec 1995

Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015C placed in air of permittivity (Take \(\frac{1}{4πεo}\) as 9.0 x 10\(^9\) Nm\(^2\)C\(^2\))

A3.40x106V
B6.75x108V
C6.75x1012V
D3.40x105V
E8.30 x 102V
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Question 20
waec 1995
Calculate the inductance L of the coil in the circuit shown below.
A14.4H
B3.8H
C0.6H
D0.4H
E0.2H
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