The Unification Decree that turned Nigeria to a Unitary State was promulgated during the regime of General

• A. Muhammadu Buhari
• B. Aguiyi Ironsi
• C. Olusegun Obasanjo
• D. Murtala Mohammed

I. Refraction II. Interference III. Diffraction Which of the above properties are common to all waves?

• A. II and III only
• B. I, II and III
• C. I and II only
• D. I and III only

A characteristic of public opinion is that it is

• A. positive
• B. static
• C. dynamic
• D. negative

Make t the subject of k = \(m \sqrt \frac{t-p}{r}\)

• A. \(\frac{k^2r + p}{m^2}\)
• B. \(\frac{k^2r + pm^2}{m^2}\)
• C. \(\frac{k^2r - p}{m^2}\)
• D. \(\frac{k^2r + p^2}{m^2}\)

(a) Sketch the magnetic flux pattern around a long; straight, current-carrying wire

(b) State two methods by which the sensitivity of a moving-coil galvanometer can be increased.

(c) A series RLC circuit comprises a 100-\(\Omega\) resistor, a 3-H inductor and a 4-\(\mu\)f capacitor. The a.c source of tile circuit has an e.m.f of 100V and a frequency of 160 Hz.

(i) Draw the circuit diagram of the arrangement. Calculate the:

(ii) capacitive reactance;

(iii) inductive reactance:

(iv) impedance of the circuit;

(v) current in the circuit;

(vi) average power dissipated in the circuit.

A member of the Commonwealth that was not colonized by Britain is

• A. Malaysia
• B. Uganda
• C. Mozambique
• D. Jamaica

Find the axis of symmetry of the curve \(y = x^{2} - 4x - 12\).

• A. x = -2
• B. y = -2
• C. x = 2
• D. y = 2

Bye-laws are made by

• A. the police
• B. parliament
• C. civil servant
• D. local authority

The subtraction below is in base seven. Find the missing number.

5 1 6 2_seven

-2 6 4 4_seven

--------

2 * 1 5

--------

• A. 2
• B. 3
• C. 4
• D. 5

If the quantity demanded of a commodity increases from 20 units to 30 units when there is an increase in price from $4.00 to $5.00, the elasticity of demand is

• A. 2.00
• B. 0.50
• C. 0.65
• D. 2.50