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Current and power

0 votes

asked Aug 22, 2015 in ELECTRICAL ENGINEERING by anonymous

2 Answers

0 votes

(1)

Step 1 :

Circuit current is image.

Find the voltage image using waveform given.

image

Observe the graph:

Two points in the interval image are image and image.

Two points in the interval image are image and image.

Find the voltage image in image.

Slope = image

Point slope form of the equation is image.

Slope = 20 and the point is image.

image

Voltage in image is image.

Step 2 :

Similarly for image.

Slope = image.

Slope = -20 and the point is image.

image

Voltage in image is image.

Find the circuit current : image.

Resistance image.

Circuit current in image :
image

Circuit current in image :
image

Therefore the circuit current is

image in image.

image in image.

Solution :

image

answered Aug 22, 2015 by justmaths Rookie
0 votes

(2)

Step 1 :

Current where  .

Power .

Substitute  and in the above equation.

where .

Step 2 :

Current where  .

Substitute  and in the above equation.

image where image.

image

Solution :

image

answered Aug 22, 2015 by sandy Pupil
edited Aug 22, 2015 by sandy

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