Unit 2

Question 1

What is resistivity

Answer 1

Resistance of 1 unit length and 1unit2
Cross sectional area object

Question 2

Strength of a field

Answer 2

How close the lines are

Question 3

electrical field by plate

Answer 3

Is constant across the field
E=v/d e=f/q

Question 4

Capacitors

Answer 4

Electrical component that store charge.are plates that when put in a circuit have an eltrocal filed across them, thus it collects charge

Question 5

One farad

Answer 5

Capacaitance of one conductor which is at a potential of 1v when it carries charge of 1 columb(1/2QV)

Question 6

Elastic deformation

Answer 6

Stretch it and returns to original shape after load is removed

Question 7

Plastic deformation

Answer 7

Stretched and does not go back to original shape after load is removed

Question 8

Crystal lattic

Answer 8

Arranged neatly

Question 9

Why does Plastic deformation occur

Answer 9

Occurs because the atoms slide over eachother ,which does not cause breaking

Question 10

Dislocation

Answer 10

Extra plane of atoms that allows e sliding

Question 11

How is dislocation helpful

Answer 11

Allows the materials to occur easier. So less force required for plastic deformation

Question 12

Ductile

Answer 12

To plasticallt deform without breaking

Question 13

Brittleness

Answer 13

Break with no plastic deformation

Question 14

Toughness

Answer 14

Ability to take sudden loads by plastically deforming

Question 15

Stiffness resilience/elasticity

Answer 15

The ratio of force to extension

Question 16

Endurance

Answer 16

The ability to take repeated loading

Question 17

Hardness

Answer 17

Resist surface abrasion/wear

Question 18

Malleability

Answer 18

Undergo plastic deformation in compression before friction

Question 19

Strength

Answer 19

Max amount of stress a material can take before breaking(plastic behaviour )

Question 20

Hooked law

Answer 20

F=kx
K=spring constant
X=extension

Question 21

Unit for inductance

Answer 21

Kgm2s2a2