The Joint Administration and Matriculation Board (JAMB) conducts Computer Based Test (CBT) for candidates who wish to study in Higher Institution. All candidates are expected to cover the syllabus in the four (4) subjects they would be writing, but because the time is short, I will be writing on five (5) topics you should read in Physics that JAMB frequently ask questions from.
Most students find Physics difficult due to the fact that you will have to know a lot of formulas and some of these formulas are not even related at all. I will try as much as possible to break the five topics down and also tell you the things you need to know.
Below are the five (5) topics you should read in Physics before your exam:
1. Heat
Heat is a very wide topic in Physics and as a student, you are expected to know the following things under the topic 'Heat';
a. Heat Capacity (H = c0)
b. Specific Heat Capacity (H = mc0)
c. Latent Heat
c1. Latent Heat of Fusion (H = mLf)
c2. Latent Heat of Vaporization (H = mLv)
In this topic, you are expected to know how to relate the specific heat capacity of one metal (substance) to another. You are also expected to know that in latent fusion, there is no change in temperature.
2. Capacitance of A Capacitor
In this topic, you are expected to know the meaning of a capacitor (a device for storing electric charges), the arrangement of a capacitor in parallel and series. You are also expected to know the factors that affect the capacitance of a capacitor, some of which are dielectric, area, distance.
As a student, you are also expected to know how to calculate the energy stored in a capacitance and how to resolve capacitors connected in series and in parallel.
For example, when a capacitor is connected in parallel, the effective capacitance of the capacitor is the algebraic sum of the capacitors (CT = C1 + C2 + C3 -------CN). When a capacitor is connected in series, the effective capacitance of the capacitor can be calculated by summing the reciprocal of the capacitors (1/CT = 1/C1 + 1/C2 + 1/C3 ----- 1/CN).
3. Dimension, Velocity, Acceleration, Motion
In this topic, you are expected to know the different types of motion and laws of motion. You are also expected to know the definition of distance, displacement, velocity, acceleration, deceleration (retardation). Students are also expected to know the dimension of quantities derived from the three fundamental quantities, Length (L), Mass (M) and Time (T). Students are also expected to know distance-time graph and velocity-time graph and how to solve their calculations.
4. Optics and Mirror
Candidates are expected to know the definition of reflection, refraction. You are also expected to know snells law, refractive index, incident ray, refracted ray.
You are also expected to know the kind of images, to include real image, virtual image, diminished, magnified. As a student, you should also know the formula that relates focal length, imagine distance and object distance.
5. Wave
Students are expected to know the types of waves (mechanical and electromagnetic), classes and properties. You are also expected to know wave propagation, wave form, wave front, wavelength, and the formulae that relates velocity, frequency and wavelength.
You are also expected to know sound wave, echo, reverberation, velocity of sound in water and the formulae to calculate the velocity of sound wave.
These are some of the topics that JAMB frequently ask questions from, so I urge you to read them. If you have any question, drop it in the comment section.
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