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185 questions

Question 1 of 20 185 total questions

Question 61

jamb 2024

Calculate the quantity of heat for copper rod whose thermal capacity is 400Jk\(^{-1}\) for a temperature change of 60ºC to 80ºC

A2KJ

B4KJ

C6KJ

D8KJ

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Question 62

jamb 2024

At absolute zero temperature, the average velocity of the molecules

ADecreases

BIncreases

CIs zero

DIs uncertain

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Question 63

jamb 2024

What is the least possible error encountered when taking measurement with a metre rule?

A1.1mm

B0.5mm

C0.2mm

D0.1mm

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Question 64

jamb 2024

Convert 60ºC to degree Fahrenheit

A111.15\(^0\)F

B115.56\(^0\)F

C132.23\(^0\)F

D140.00\(^0\)F

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Question 65

jamb 2024

A hydrometer of mass y kg and volume 2y x 10\(^{-5}\)m\(^3\) floats in a fluid with 20% of its volume above the fluid, what is the density of the fluid?

A6.22 x 10\(^4\)kgm\(^{-3}\)

B6.23 x 10\(^4\)kgm\(^{-3}\)

C6.24 x 10\(^4\)kgm\(^{-3}\)

D6.25 x 10\(^4\)kgm\(^{-3}\)

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Question 66

jamb 2024

The energy in a moving car is an example of

AMechanical energy

BElectrical energy

CPotential energy

DKinetic energy

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Question 67

jamb 2024

The property by which a material returns to its original shape after the removal of force is called

AElasticity

BDuctility

CMalleability

DPlasticity

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Question 68

jamb 2024

According to kinetic theory of gases, the pressure exerted by the gas on the wall is equal

Achange in momentum per unit volume

Brate of change of momentum imparted by the walls per second per unit area

Cmomentum imparted to the walls per unit area

Dchange in momentum imparted to the walls per unit area

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Question 69

jamb 2024

The degree of precision of a vernier caliper is

A0.005cm

B0.01cm

C0.1cm

D1.0cm

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Question 70

jamb 2024

If the rate of evaporation is y, and the rate of condensation is x, then, a vapour is saturated when

Ax > y

Cx = y

Dx \(\leq\) y

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Question 71

jamb 2024

In electrolysis, when same quantity of electricity is passed through different electrolytes, mass of substances deposited is proportional to

AMolecular weight

BChemical equivalent

CAtomic number

DChemical equivalent per valency

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Question 72

jamb 2024

If a charge ion goes through a combined electric field E and magnetic field B, the resultant emergent velocity of the ion is

A\(\frac{E}{B}\)

BEB

C\(\frac{B}{E}\)

DE-B

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Question 73

jamb 2024

What is the inductance reactance of a coil of 7H when connected to a 50Hz a.c circuit?

A2200\(\Omega\)

B2000\(\Omega\)

C1200\(\Omega\)

D1100\(\Omega\)

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Question 74

jamb 2024

A refrigerator uses 150W. If it is kept on for 336 hours non-stop, what is the energy consumed in KWh?

A60.20KWh

B50.40KWh

C25.01KWh

D30.20KWh

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Question 75

jamb 2024

Which of the following is the best as shaving mirror?

AConcave mirror

BConvex mirror

Cplane mirror

Dparabolic mirror

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Question 76

jamb 2024

In voltage measurement, the potentiometer is preferred to voltmeter because it

Ahas a wider range

Bconsumes negligible current

Cis bulky

Dresponds faster than voltmeter

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Question 77

jamb 2024

A cell of internal resistance of 2\(\Omega\) supplies current through a resistor, X if the efficiency of the cell is 75%, find the value of X.

A2\(\Omega\)

B4\(\Omega\)

C6\(\Omega\)

D8\(\Omega\)

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Question 78

jamb 2024

The fourth overtone of a closed pipes is 900Hz, its fundamental frequency is

A50Hz

B100Hz

C200Hz

D400Hz

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Question 79

jamb 2024

The average translational kinetic energy of gas molecules depends on

ATemperature only

BNumber of moles and temperature

CPressure and temperature

DPressure only

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Question 80

jamb 2024

A load of 300N is to be lifted by a machine with a velocity ratio of 2 and an efficiency of 60%. What effort will be applied to lift the load?

A100N

B150N

C250N

D400N

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