(a) Define electromotive force.

(b) State:

(i) the principle of operation of a potentiometer,

(ii) two advantages that a potentiometer has over a voltmeter in measuring potential difference.

(c)(i) Sketch and label a diagram of a gold-leaf electroscope.

(ii) Give one use of a gold-leaf electroscope.

(d)(i) Explain the action of a magnetic relay.

(ii) List two factors which determine the magnitude of an induced emf in a coil.

(iii) A current of 5 A passes through a straight wire in a uniform magnetic field of flux density 2.0 x10\(^{-3}\) T. Calculate the force per unit length exerted on the wire when it is inclined at 30° to the field.

With regards to giving, Paul admonishes the Romans to do so with_______________

• A. Joy
• B. Love
• C. Liberality
• D. Zeal

A major civil society group which campaigned against military rule prior to the advent of the fourth republic in Nigeria is the

• A. campaign for democracy
• B. save Nigeria group
• C. civil liberties organisation
• D. National democratic coalition

Alabede (NIG) limited issued 50 000 ordinary shares of N1 each at a market value of N2.50 each. the share premium is?

• A. N125 000
• B. N500 000
• C. N50 000
• D. N25 000

The highest decision-making body in Nigeria under the Buhari's military regime was the ________

• A. Armed forces ruling council
• B. Supreme military council
• C. National council of states
• D. Federal executive council

The most common characteristic of the fungal hyphae is the possession of

• A. cell-like compartment with one nucleus each
• B. cell walls that are both rigid and chitinous
• C. a multicellular mycelium in the substrate
• D. cell-like partitions formed by cross-walls

Government can influence aggregate demand through all the following measures except

• A. reduction in personal income tax
• B. retirement of director-general in the public service
• C. creation of employment opportunities
• D. compulsory deduction from salaries of all categories of workers

The profit of a sole trader increases his ______.

• A) stock
• B) asset
• C) liability
• D) capital

A machine of efficiency 8% is used to raise a body of mass 75kg through a vertical height of 3m in 30s. Calculate the power input. (g = 10ms^-2)

• A. 9.4W
• B. 60.0W
• C. 75.0W
• D. 93.8W

The Public Service Review Commission of 1991 made proposals to ensure that the public service was

• A. more effective than the private sector
• B. more attractive than the private sector
• C. professionalized
• D. efficient and result-oriented