If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT?
A4:01
B1:04
C5:01
D2:01
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Question 42
jamb2015
If the velocity ratio of a machine is 5. What is its ratio of x and y?
A2 : 5
B1 : 5
C5 : 1
D3 : 1
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Question 43
jamb2015
If a ball released from a height of 20m, How long would it take the ball to reach the ground? (assures g = 10m/s)
A2sec
B3sec
C35sec
D2.4sec
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Question 44
jamb2015
A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k
A0.11kg
B0.12kg
C0.13kg
D0.14kg
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Question 45
jamb2015
If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s2)
A2 sec
B3 sec
C4sec
D3.2sec
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Question 46
jamb2015
What type of electromagnetic radiation can be used to take photographs in the haze?
ARadio waves
Binfrared rays
CVisible light
DGamma rays
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Question 47
jamb2015
Lodestone is a natural magnet, it points at
AN – W when suspended freely
BN–S when suspended freely
CS – E when suspended freely
DS–W when suspended freely
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Question 48
jamb2015
Quantities of heat Q can be measured using a container called
AThermometer
BMeasuring cylinder
CCalorimeter
DMeter rule
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Question 49
jamb2015
Heat transfer in the surrounding without a material medium is possible through?
AConduction
BConvection
CRadiation
DExpansion
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Question 50
jamb2015
The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as
AElectromagnetic devices
BMagnetic relay device
CNone at all
DSextant
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Question 51
jamb2015
At what respective value of a, b, and c would the unit of work, the joule, be dimensionally similar to Ma Lb Tc?
A1, – 2, 1
B1, 2, – 2
C1, 1, –2
D2, 2, 1
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Question 52
jamb2015
The compressed regions and the space-out regions in longitude wave are refers to as
ACompression and Rarefaction
BComparison and Explosion
CReflection only
DRefraction only
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Question 53
jamb2015
Radio waves belong to the class of wave whose velocity is about
A34m/s
B3 ×106m/s
C3 ×108m/s
D3 × 10-8m/s
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Question 54
jamb2015
A member of the crew of a SPACESHIP experiences weightlessness in a space when they
AFall freely from the earth’s gravitational field
BIs walking on the planet
CIn between the sun and the earth
DHolding anything in space is negative
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Question 55
jamb2015
Convert 45°C to kelvin
A318K
B250K
C184K
D120K
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Question 56
jamb2015
The external parts of an object can be measure accurately through the use of which scientific instrument?
AMicrometer screw gauge
BVernier Caliper
CMeter rule
DNone of the instrument
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Question 57
jamb2015
What is the relationship mechanical advantage (MA) velocity Ratio (V.R) and efficiency with percentage?
Ae = M.A/V.R × 100 %
BM.A = E.V.R
CV.R = 1 ÷ sin θ M.A
DM.A = 1/E × 100%
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Question 58
jamb2015
Electrons were discovered by
AJames Chadwick B.
BJ.J Thompson
CSir Isaac Newton
DCharles Newton
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Question 59
jamb2015
Primary colours of light are
ARed, blue and green
BCyan, magneta and yellow
CBlack, blue and green
DNone of these colours
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Question 60
jamb2015
Mr. F. Abioye observed his image through a plane mirror, kept at a distance 4.7m away from him in his room. At what distance is the image found from Abioye's eye?
