A cell of emf 1.5V is connected in series with a 1Ω resistor and a current of 0.3A flows through the resistor. Find the internal resistance of the cell

• A. 4.0Ω
• B. 3.0Ω
• C. 1.5Ω
• D. 1.0Ω

My stiffest earthly assignment is ended and major life's work is done. My country is now free... - Dr. Nnamdi Azikiwe

The speaker quoted above must have fought hard for national

• A. prosperity
• B. recognition
• C. development
• D. independence

If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

• A. 24 years
• B. 20 years
• C. 10 years
• D. 2 years

(a) Explain: (i) Fusion. (ii) Fission.

(b) State three advantages of fusion over fission in the generation of power

(c) Calculate in joules, the binding energy for

\(\frac{59}{27}\) Co

(Atomic mass of \(^{59}_{2} Co\) = 58.9332 u)

(Mass of proton = 1.00783u)

(Mass of neutron = 1.00867 u)

(Unified atomic mass unit, U = 931 MeV)

(1 eV = 1.6 x 10\(^{-19}\) J)

The diagram below shows the position of a simple pendulum set in motion. At which of the positions does the pendulum have maximum kinetic energy?

• A. 5
• B. 4
• C. 3
• D. 2

A converging lens of focal length 5cm is used as a magnifying glass by a man whose nearpoint is 35cm. Calculate the magnification given by the lens

• A. 8
• B. 7
• C. 6
• D. 5

In each of the following sentences, there is one word underlined and one gap. From the list of words lettered A - D, choose the word that is most nearly opposite in meaning to the underlined word and that will, at the same time, correctly fill the gap in the sentences.

The testimony of the witness was sovague that it was difficult to learn the...........details of the case

• A. specific
• B. minute
• C. transparent
• D. hidden

Which of the following units is equivalent to the unit of electric current?

• A. C s\({-1}\)
• B. W
• C. J s\({-1}\)
• D. C

A village consists of twenty (20) households with the following annual incomes-

(Incomes$00) 30 20 50 40 60 40 40 50 20 60 80 40 20 20 70 40 70 30 40 80

(a) Determine the (i) mean income: [4 marks] (ii) modal income; [ 2 marks] (iii) median income. [2 marks]

(b) What is the range of income distribution? [2 marks]

(c) Calculate the total tax that could be generated from the village if (i) a flat rate tax of 7% is imposed on all households; [5 marks] (ii) a flat rate tax of 15% is imposed on all households earning $4,000 per annum and above. [5 marks]

lf sin θ= \(\frac{-1}{2}\), find all the values of θ between 0° and 360°.

• A. 120°,240°
• B. 120°,180°
• C. 210°,300°
• D. 210°,330°