Physics Past Questions

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

45 questions
Question 1 of 20 45 total questions
Question 1
waec 2001

Electrons passing through crystals are diffracted because they

Aare repelled by the atoms in the crystal
Bare attracted by the atoms in the crystals
Cpossess wave properties
Dare particles
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Question 2
waec 2001

A nitrogen nucleus bombarded with an alpha particle produces an oxygen nucleus and a proton. The nuclear reaction for this process is \(^4_2H + ^{14}_2N \to ^{17}_{8}O + ^1_1H + Q\). Which of the following statements about the reaction is not correct?

Athe bombardment results into a nucleus with greater proton number
Bit is an induced nuclear reaction
Cit is a natural radioactive decay
Dthe sum of the final nucleon numbers
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Question 3
waec 2001

Production of x-ray tube begins with

Aphoto electric emission
Bcollision of electrons
Cthermionic emission
Dfield emission of electrons
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Question 4
waec 2001

Calculate the reactance of the inductor in the circuit diagram shown above [\(\pi = \frac{22}{7}\)]

A132\(\Omega\)
B214\(\Omega\)
C264\(\Omega\)
D269\(\Omega\)
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Question 5
waec 2001

In the circuit diagram above. Calculate the energy stored in the inductor at resonance

A0.100J
B0.050J
C0.010J
D0.005J
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Question 6
waec 2001

The material used for constructing the core of an electromagnet is

Airon
Bcarbon
Ccopper
Dsteel
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Question 7
waec 2001

Which of the following statements about magnetic lines of force is not correct?

Aa magnnetic line of force is an imaginary line which the north pole of a magnet would describe if it is free to moves
Bmagnetic lines of force do not cross one another
Cmagnetic lines of force are closely packed together at neutral point
Dthe presence of magnetic lines of force in a region indicates the presence of a magnetic field
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Question 8
waec 2001

The Earth's magnetic equator passes through Jos in Nigeria. At Jos. the

Aangle of variation is zero
Bmagnetic declination is 90o
Cangle of dip is zero
Dhorizontal component of the Earth's magnetic field is zero
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Question 9
waec 2001

An electric bulb is rated 60W, 220V. Calculate the resistance of its filament when it is operating normally

A296.7\(\Omega\)
B400.0\(\Omega\)
C512.2\(\Omega\)
D806.7\(\Omega\)
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Question 10
waec 2001
Three identical lamps each power 100W are connected in parallel across a potential difference of 250V. Calculate the current in the circuit
A7.5A
B2.5A
C1.2A
D0.8A
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Question 11
waec 2001
What is the total energy stored by the capacitors?
A2.0 x 10-4J
B1.0 x 10-4J
C9.0 x 10-2J
D1.0 x 10-2J
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Question 12
waec 2001
What is the effective capacitance in the circuit?
A2\(\mu F\)
B6\(\mu F\)
C18\(\mu F\)
D216\(\mu F\)
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Question 13
waec 2001

As the plates of a charged variable capacitor are moved closer together, the potential difference between them

Aincreased
Bdecrease
Cremains the same
Dis doubled
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Question 14
waec 2001
The magnitude of the gravitational force between two particles 0.10m apart is 10N. If the distance between them is increased to 0.20m, calculate the magnitude of the new force
A40.0N
B20.0N
C5.0N
D2.5N
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Question 15
waec 2001
If the frequency of the tuning fork at resonance is 256Hz, calculate the frequency of vibration of the wire when the tension in he wire is increased to 196N
A130.6Hz
B182.9Hz
C358.4Hz
D501.8Hz
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Question 16
waec 2001

The diagram above shows the wire of a sonometer box set into resonance by a vibrating tuning fork of frequency f, when the wire is stretched by a tension T, the resonating length of the wire is I while the wavelength of the sound produced is \(\lambda\). Which of the following statements about the frequency of vibration of the wire is not correct?

Aproportional to the mass per unit length of the wire
Bequal to the frequency of the tuning fork
Cinversely proportional to the length of the wire
Dproportional to the sqare root of the tension
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Question 17
waec 2001

The diagram above shows the wire of a sonometer box set into resonance by a vibrating tuning fork of frequency f, when the wire is stretched by a tension T, the resonating length of the wire is I while the wavelength of the sound produced is \(\lambda\). Which of the following statements is not correct? The wave produced on the wire is

Astationary and lonitudinal
Bstationary and mechanical
Cmechanical and longitudinal
Dprogessive and transverse
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Question 18
waec 2001

Which of the following statements about sound is correct?

Awhen sound travels from air to a denser medium, it is refracted away from the normal at the point of incidence
Bsound travels faster in air than in water
Cthe wavelength of sound changes when it travels from to water
Dthe frequency of it travels from air to water
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Question 19
waec 2001

Dispersion of white light by a glass prism occurs because

Awhite light consist of a mixture of seven different colour
Bthe refractive index of glass is different from each constituent colour of white light
Cthe speed of each colour of light in the glass is proportional to the refractive index of glass for each colour
Dthe speed of each colour of light in the glass is proportional to the angle of refraction in he prism
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Question 20
waec 2001

A piece of cloth appears green in sunlight. When held in red light, it will appear

Agreen
Bblue
Cred
Dblack
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