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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.
Cathode rays are
Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?
What is the resultant resistance of the circuit in the image shown?
Which of the following does NOT describe the Image formed by a plane minor?
Which of the following is true of an electrical charge?
Natural radioactivity consists of the emission of
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?
A man walks 1km due east and then 1 km due north His displacement?
| Radio wave | Micro wave | Infrared wave | P | Q | R | Gamma Ray |
The table above shows the components of electromagnetic spectrum in order of increaasing frequency.Which of the following sets correctly identifies P, Q, R respectively?
Which of the following statements about Gamma radiation is correct? Gamma radiation can
| n = \(\alpha\) | 0.06eV |
| E=3 | -1.6eV |
| E=2 | -3.7eV |
| E=1 | -5.5eV |
| E=0 | -10.4eV |
The energy levels in the mercury atom is illustrated in the table above. Calculate the ionisation energy of the atom.
The nucleon number of an atom is the total number of
Which of the following pairs of concepts constitutes complementary variables as expressess by the Heinsberg uncertainty principle?
The opposition offered to an alternating current in a C-R series circuit is known as
The diagram above illustrates two charged bodies, X and Y separated by a distance r. Each body has charge q and mass m. Which of the following statements about the electrostatic force \(F_{e}\) and gravitational force \(F_{g}\) acting between the bodies is correct?
The main reason why a.c. is transmitted at very high voltage and low current is that
A battery of e.m.f 3.0V is connected across a potentiometer wire AB of length 10\(\Omega m^{-1}\) as illustrated in the diagram above. If the jockey J makes contact at the 30cm mark, determine the resistance of length AJ and voltage across AJ.
A lamp rated 100W, 240V is lit for 5hours. Calculate the cost of lighting the lamp if 1kWh of electrical energy cost N5.
A transformer connected to a 240\(V_{r.m.s}\) has 3000 turns in its primary coil and 500 turns in its secondary coil. Calculate the output voltage.
The diagrams above illustrate electrical connections to the element of an electric pressing iron.In which of the connections is the fuse correctly fixed?