Physics Past Questions

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

100 questions
Question 1 of 20 100 total questions
Question 41
jamb 2006

In an experiment to determine terminal velocity, as the pressure increases, the viscosity off a liquid

Aincreases
Bdecreases
Cincreases then decreases
Dremains constant
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Question 42
jamb 2006

The motion of smoke particles from a chimney is typical of?

Arandom motion
Bcircular motion
Crotational motion
Doscillatory motion
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Question 43
jamb 2006

An ammeter of resistance 5Ω has a full-scale deflection when a current of 50 mA flows in it. The value of the resistor required to adapt it to measure a current of 5 A is?

A0.25Ω
B5.00Ω
C19.80Ω
D0.05Ω
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Question 44
jamb 2006
When a certain a.c supply is connected to a lamp, it lights with the same brightness as it does with a 12 V d.c battery. Then r.m.s value of the a.c supply is?
A12.0 V
B3.5 V
C17.0 V
D8.5
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Question 45
jamb 2006
During electrolysis, 2.0 g of a metal is deposited using a current of 0.5 A in 3 hours. The mass of the same metal which can be deposited using a current of 1.5 A in 1 hour is?
A1.0 g
B0.5 g
C3.0 g
D2.0 g
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Question 46
jamb 2006

The electrolyte in the Nickei-iron (Nife) accumulator is

Apotassium hydroxide solution
Bdilute tetraoxosulphate(VI)acid
Ccopper tetraoxosulphate(VI)solution
Dammonium chloride solution
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Question 47
jamb 2006
When an a.c. voltage is applied to a capacitor, no power is consumed because the current
Aleads the voltage by 90°
Blags behind the voltage by 90°
Cand voltage are in phase
Dand voltage are 180° out of phase
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Question 48
jamb 2006

If the capacitance of a capacitor is C = \(\frac{(εA)}{d}\) which of the following parameters is varied when a variable capacitors is used for tuning radio sets?

Aconstant (ε) and area
Barea and distance.
Cconstant (ε) only
Ddistance only
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Question 49
jamb 2006
An electric heater with a p.d of 240 V connected across its terminals has a total resistance of 960Ω. find the power rating of the heater.
A0.25 W
B4.00 W
C38.40W
D60.00W
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Question 50
jamb 2006

The main purpose of the transformer in an a.c radio set is to?

Aincrease power to the radio
Bstep up the voltage
Cconvert energy from a.c to d.c
Dstep down the voltage
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Question 51
jamb 2006

The production and type of charge of a body can only be accounted for by the?

Adeficiency or surplus of electrons
Bequibrium in protons and neutrons
Cdeficiency or surplus of protrons
Ddeficiency or surplus of neutrons
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Question 52
jamb 2006

A cell of internal resistance r is connected to an external resistor R. The condition for maximum power transfer is?

AR < r
BR = r
CR = 2r
DR > r
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Question 53
jamb 2006

A drop of petrol makes a finger colder than a drop of water would because?

Apetrol takes its latent heat of veporization from the finger
Bpetrol takes its latent heat of fusion from the finger
Cwater is more viscious than petrol
Dwater has higher surface tension dan petrol
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Question 54
jamb 2006

what is likely to happen if the glass of a thermometer expands more upon heating than the liquid inside?

Athe glass will break
Bthe glass will shrink
Cthe liquid will rise up in the stem
Dthe liquid will go down in the stem
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Question 55
jamb 2006

The thermos flask is designed to?

Aprevent heat loss or gain by conduction, convection and radiation
Bstore hot tea or water
Cprevent heat gain by conduction, convection and radiation
Dprevent heat lost by conduction, convention and radiation
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Question 56
jamb 2006
An immersion heater rated 2.0A, 240V is used to boil water from temperature 52°c to 100°c. If the mass of the water is 2.5kg. determine the time taken to boil the water.


[specific heat capacity of water = 4.2 x 103 jkg-1 k-1]
A1.05 x 103s
B1.05 x 105s
C1.05 x 102s
D1.05 x 104s
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Question 57
jamb 2006
The thermometric property of a constant volume thermometer is?
Achange in volume
Bdifferential expanssion
Cchange in pressure
Dchange in length
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Question 58
jamb 2006
If the relative density of gold is 19.2, the volume of 2.4kg of gold is?
A8.00 x 10-3 m3
B1.25 x 10-4 m3
C1.92 x 10-4 m3
D4.61 x 10-3 m3
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Question 59
jamb 2006

At low humidity in an environment, the human skin is usually?

Adamp and rough
Bdamp and smooth
Cdry and rough
Ddry and smooth
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Question 60
jamb 2006
A uniform solid cube material 10cm on each side of mass 700g is submerged in water. which of the following best described the behavior of the cube water?
Athe cube will melt after a period of time
Bthe cube will float
Cthe cube will sink in water
Dthe cube will rest at an equilibrium position in water
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