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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.
When the base current of a common-emitter transistor is kept at zero, it operates in the
Use the figures above to answer the question below
Which of the following diagrams represents correctly an n-p-n transistor?
Use the diagram above to answer the question below.
Which of the following diagrams represents the magnetic field of two isolated unlike poles
The frequency of the wave in the diagram above is
A progressive wave equation is represented by y = a sin(150 πt - \(\frac{πx}{4}\)). if the phase difference of a progressive wave is 45°, the value of x in the equation is
An engine of a car of power 80 kW moves on a rough road with a velocity of 32 m\(s^-1\). The forces required to bring it to rest is
A mirror of weight 75N is hung by a cord from a hook on the wall. If the cord makes an angle of 30o with horizontal, the tension in the cord is
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?