Question

The packing efficiency of the two dimensional square unit cell shown below is:

विकल्प

• 39.27%

• 68.02%

• 74.05%

• 78.54%

Answer 1

78.54%

Explanation:

Packing efficiency = `"Area covered by particle"/"Total area"`

= `(2pir^2)/((2sqrt(2r))^2`

= `pi/4`

= `3.142/4 xx 100`

= 78.54%