Physics Past Questions

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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

2,483 questions
Question 1 of 20 2,483 total questions
Question 591
jamb 2006

The correct unit of energy density is?

Akg m3 s-2
Bkg m2 s-2
Ckg m-3 s-2
Dkg m-1 s-2
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Question 592
jamb 2006

The component of vector X along the direction of vector Y is zero when

AX and Y are in opposite directions to each other
BX is at an angle of 45° to Y
CX is perpendicular to Y
DX and Y are parallel to each other
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Question 593
jamb 2006

If the radius of the Earth is 6.4 x 10\(^6\)m, the escape velocity of a satellite from the Earth is?
[g = 10 ms\(^-2\)]

A1.13 x 104 ms-1
B9.00 x 103 ms-1
C8.00 x 103 ms-1
D1.27 x 104 ms-1
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Question 594
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 595
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 596
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 597
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 598
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 599
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 600
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 601
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 602
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 603
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 604
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 605
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 606
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 607
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 608
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 609
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 610
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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