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Create and set up a CBT environment with your preferred subjects.
Practice JAMB CBT with real UTME past questions in CBT format.
CB-WASSCE styled past question practice.
SSCE & GCE styled past question practice.
The diagram above represents the stress-strain graph for a typical metal rod. What does the X represent?
A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is?
A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is?
The wavelength of the first overtone of a note in a closed pipe of length 33 cm is?
Non-luminous object can be seen because they
A submarine is observed to rise from a real depth of 80 m to 60 m in water. Calculate the change in apparent depth.
[Refraction index of water \(\frac{4}{3}\)]
An object placed 10cm from a concave mirror of focal length 5cm would have its image
A p-n junction diode is used as?
A certain manufacturer wishes to make an n-type semiconductor. Which materials would he select for doping?
I. The number of neutrons released exceeds the number that caused the fission.
II. There is loss of mass.
III. Energy is produced.
IV. Smaller nuclei merge to form larger nuclei
which of the statement above are correct about nuclear fission?
The theory of electronic conduction in solids, which satisfactorily explains the properties of conductors, insulators and semi-conductor,is?
A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?
One of the properties of gamma rays is that they are?
The battery connection that permits current to flow across a p-n junction is called?
The process through which free electrons leave the surface of hot metal is known as?
The energy associated with the emitted photon when a mercury atom changes from one state to another is 3.3 ev. calculate the frequency of the photon.
[e = 1.6 x 10-19c; h = 6.6 x 10-34js]
I. Work done by load is always less than the work done by effort.
II. All machines are made of levers, pulleys, screws and gear wheels.
III. A fishing rod is a machine.
Iv. Effort is always larger than load.
which of statements above about machines are true?
The correct unit of energy density is?
The component of vector X along the direction of vector Y is zero when
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\(^-2\)]