The engineering and catering courses will require much greater use of expensive machinery and equipment, which in turn will need more room. In addition these courses will probably require much greater lecturer input than on the business studies courses. The much lower staff/student ratio will push up the teaching costs per student. Another factor to be considered is the variability in the student numbers. This variable is unlikely to have an impact on many of the university costs, which are mainly fixed in nature. For example, if in the following year intake is up to sixty on the mechanical engineering degree, with a similar level of costs, the average cost per student would fall to nearly that being reported for a catering studies student. These average costs figures must be interpreted with great care by the management. They give a 'rough' guide to the relative cost of degree courses but the arbitrary apportionments render them very nearly useless for decision-making. For decision making incremental costs are required.

1.      State the dimensional formula of electromotive force.

2.      Explain why internal resistance does not depend on temperature of the electrolyte.

3.      State whether the emf of a cell relies on the concentration of the electrolyte

4.      Discuss the effect on potential difference and emf of a cell when it's discharged

5.      Calculate resistance of the resistor given that it is connected to a cell with emf 6V, internal resistance of 1 ohms and current of 0.5A

6.      State the most accurate device for measuring electromotive force.

7.      Explain what happens when a cell is connected wrongly in a series circuit

8.      Find out the number of cells with emf of 2V and internal resistance 1V joined to a series of 30 ohms resistance. The current through it is 0.8A

9.      Explain why in parallel grouping of cells more current is produced

10.  Given 4 resistors of 4 ohms each, two of them connected in a series to a cell of IR of 2 Ohms then they are connected in parallel to the same cell. calculate the ratio of the respective current in the set-up

Answer rating: 100% (QA)

SOLUTION 1 The dimensional formula of electromotive force is M L2 T3 I1 2 Internal resistance is determined by the chemical composition and physical structure of the electrolyte and electrodes in a ce... View the full answer