The point in the stress-strain curve at which the strain increases considerably without any increases in stress is called:
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Edson
The point in the stress-strain curve at which the cross-sectional area of the test specimen starts decreasing is called the:
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Edson
Modulus of rigidity may be defined as the ratio of:
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Edson
Within elastic limits,Hooke’s law states that:
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Edson
Ductility is a property of the material due to which it can be:
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Edson
Elasticity is a property of the material due to which:
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Edson
A 90V d.c. generator is used to charge a battery of 40 cells in series, each cell having an average e.m.f. of 1.9V and an internal resistance of 0.0025Ω. If the total resistance of the connecting leads is 1Ω, calculate the value of the charging current.
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Erick
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A nickel-alkaline battery is discharged at a constant current of 6A for 12h at an average terminal voltage of 1.2V. A charging current of 4A for 22h, at an average terminal voltage of 1.5V is required to re-charge the battery completely. Calculate the ampere hour and watt hour efficiencies.
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Erick
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An accumulator is charged at the rate of 6 amperes for 18 hours and then discharged at the rate of 3.5 amperes for 28 hours. Find the ampere hour efficiency.
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Erick
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Solve:
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Erick
Ten thousand cubic millimetres of copper are (a) drawn into a wire 100 metres long, (b) rolled into a square sheet of 100mm side. Find the resistance of a wire and the resistance between opposite faces of the plate, if ...