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137 questions

Question 1 of 17 137 total questions

Question 61

jamb 2018

In the diagram given the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static

A\(\frac{m_1}{m_2}\)

B\(\frac{m_1g}{m_2}\)

C\(\frac{m_2}{m_1}\)

D\(\frac{m_2g}{m_1}\)

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Question 62

jamb 2018

Which of the following statements are TRUE of isotopes?
I. Isotopes of an element have the same chemical properties because they have the same number of electrons
II. Isotopes of elements are normally separated using physical properties
III. Isotopes of an element have the same number of protons in their nuclei

AI and II only

BI and III only

CII and III only

DI, II and III

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Question 63

jamb 2018

Which of the following obeys Ohm's law?

Aall metals

Bdiode only

Call electrolytes

Dglass

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Question 64

jamb 2018

Shadows and eclipses result from the

Arefraction of light

Breflection of light

Cdefraction of light

Drectilinear propagation of light

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Question 65

jamb 2018

The electrochemical equivalent of silver is 0.0012g/C. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5mins, the current must be?

A6000A

B100A

C10A

D1A

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Question 66

jamb 2018

The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

Aspecific heat capacity

Blatent heat

Cheat capacity

Dinternal energy

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Question 67

jamb 2018

What type of reaction is represented by the following scheme?
\(_{1} ^{2} X\) + \(_{1} ^{2} Y\) -----> \(_{2} ^{3} Z\) + \(_{0} ^{1} n\) + energy

Afusion reaction

Bfission reaction

CChain reaction

Dradioactive decay

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Question 68

jamb 2018

The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?

A28.0

B48.0N

C233.0N

D50.0N

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Question 69

jamb 2018

A narrow beam of white light can be split up into different Colours by a glass prism. The correct explanation is that

Awhite light Is an electromagnetic wave

Bthe prism has all the colours of the white light

Cdifferent colours of white light travel with different speeds in glass

Dwhite light has undergone total Internal reflection in the prism

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Question 70

jamb 2018

Cathode rays are

AHigh-energy electromagnetic waves

Bprotons

Cneutrons

Dstreams of electrons

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Question 71

jamb 2018

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

Aheat ----> Light----> Sound ----> Kinetic

BKinetic ----> Light ----> Heat ----> Electricity

Cheat ----> Kinetic ----> Electricity ----> Heat and Light

Delectricity ----> Kinetic ----> Heat ----> Light

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Question 72

jamb 2018

What is the resultant resistance of the circuit in the image shown?

A8Ω

B11Ω

C4Ω

D3.6Ω

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Question 73

jamb 2018

Which of the following does NOT describe the Image formed by a plane minor?

AErect

BLaterally inverted

CSame distance from mirror as object

DMagnified

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Question 74

jamb 2018

Which of the following is true of an electrical charge?

APositive charge means deficit electrons

BNegative charge means excess of electrons

Celectric current means movement of electrons

DAll of the above

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Question 75

jamb 2018

Natural radioactivity consists of the emission of

Aα- particles and β-rays

Bα- particles and X-rays

Cα- particles, β - rays and y-rays

Dγ- rays and X-rays

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Question 76

jamb 2018

The density of 400cm\(^3\) of palm oil was 0.9gcm-3 before frying. If the density of the oil was 0.6gcm-3 after frying, assuming no loss of oil due to spilling, its new volume was?

A1360cm\(^3\)

B600cm\(^3\)

C240cm\(^3\)

D8000m\(^3\)

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Question 77

jamb 2018

A man walks 1km due east and then 1 km due north His displacement?

A√2km N 45°E

B1km N 30°E

C1km N 15°E

D√2km N 60°E

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