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3 years ago

6

A step-down transformer (turns ratio = 1:7) is used with an electric train to reduce the voltage from the wall receptacle to a v

alue needed to operate the train. When the train is running, the current in the secondary coil is 1.04 A. What is the current in the primary coil?

1 answer:

SOVA2 [1]3 years ago

6 0

Answer:

wait lemme check it out

Explanation:

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Write a new ARMv8 assembly file called "lab04b.S" which is called by your main function. It should have the following specificat

Len [333]

Answer:

my_mul:

.globl my_mul

my_mul:

//Multiply X0 and X1

// Does not handle negative X1!

// Note : This is an in efficient way to multipy!

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STUR X19, [SP, 0] //push X19

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mult_loop:

CBZ X19, mult_eol

ADD X9, X9, X0

SUB X19, X19, 1

B mult_loop

mult_eol:

LDUR X19, [SP, 0]

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Explanation:

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3 years ago

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2 years ago

The water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine-generator at a locati

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Answer:

a) 0.76

b) 0.80

c) 1964 kW

Explanation:

GIVEN DATA:

$\dot m = 5000 kg/s$

Assume Mechanical energy at exist is negligible

A) Take lake bottom as reference, and then kinetic and potential energy are taken as zero.

change in mechanical energy is givrn as

$e_{in} - e_{out} = \frac{P}{\rho} - 0 = gh = 9.81 \times 50( \frac{1 kJ/kg}{1000 m^2/s^2}$

= 0.491 kJ/kg

$\Delta \dot E_{mec} = \dot m (e_{in} - e_{out}) = 5000 \times 0.491 = 2455 kW$

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B) $\eta -{gen} = \frac{\eta_{overall}}{\eta_{gen}} = \frac{0.76}{0.95} = 0.80$

c) $\dot W_{shaft} = \eta_{overall} \left | \Delta \dot E_{mec} \right | = 0.80(2455)$

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