An analogue electrical indicating instrument has a moving coil of 4 ohms resistance and gives full-scale deflection when carrying a current of 75mA. Explain, with the aid of sketches, how the instrument may be used to indicate at full-scale deflection of (i) a current of 10A and (ii) a P. D. of 100 V. [4 marks]

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

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An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid