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50 questions

Question 1 of 10 50 total questions

Question 21

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

View Explanation & Discuss

Question 22

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 23

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

View Explanation & Discuss

Question 24

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 25

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 26

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 27

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 28

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 29

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 30

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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