Definitions

Question 1

Chemical Bond

Answer 1

A lasting attraction between atoms or ions that results in the formation of chemical compounds

Question 2

Covalent Bond

Answer 2

An electrostatic interaction that involves the sharing of electrons between atoms to form molecules

Question 3

Molecule

Answer 3

A neutral group of two or more atoms which are bonded together sufficiently strongly to act as a unit in chemical reactions

Question 4

Electronegativity

Answer 4

Measure of the tendency of an atom to attract a shared pair of electrons towards itself

Question 5

Ionic Bond

Answer 5

Involves the transfer of electrons to form positive ions (cations) and negative ions (anions)
The electrostatic interaction between these is known as an ionic bond and forms a three dimensional lattice structure

Question 6

Valency

Answer 6

The measure of combining capacity with other atoms when it forms chemical compounds
Number of bonds that the atoms can form

Question 7

Potential Difference

Answer 7

The work done or energy transferred per unit charge to move charge between two points in a circuit

Question 8

EMF

Answer 8

The energy provided by a battery per unit charge flowing through the battery

Question 9

Terminal Potential Difference

Answer 9

Voltage measured across the terminals of a battery when charges are flowing in a circuit

Question 10

Current Strength

Answer 10

The rate of flow of charge

Question 11

Resistance

Answer 11

The rate of potential difference across a component to the current in a component

Question 12

One ohm

Answer 12

Equal to one volt per ampere

Question 13

One Coulomb

Answer 13

The charge transferred in a conductor in one second if the current is one ampere

Question 14

Ohm’s law

Answer 14

Potential difference across a conductor is directly proportional to the current in the conductor at constant temperature

Question 15

Vector

Answer 15

Physical quantity with MAGNITUDE AND DIRECTION

Question 16

Scalar

Answer 16

Physical quantity with magnitude only

Question 17

Resultant

Answer 17

The single vector having the same effect as two or more vectors acting together

Question 18

One dimensional Motion

Answer 18

Motion along a straight line

Question 19

Frame Of Reference

Answer 19

Reference point combined with a set of directions

Question 20

Position

Answer 20

Location relative to a reference point

Question 21

Distance

Answer 21

Total path length travelled

Question 22

Displacement

Answer 22

Overall change in position of an object

Question 23

Average Speed

Answer 23

Total distance travelled per total time

Question 24

Average Velocity

Answer 24

Rate of change of displacement

Question 25

Acceleration

Answer 25

Rate of change of velocity

Question 26

Instantaneous Velocity

Answer 26

Velocity of an object at a particular time

Question 27

Instantaneous Speed

Answer 27

Speed of an object at a particular time

Question 28

Uniform Velocity

Answer 28

Motion of an object at constant velocity

Question 29

Uniform Acceleration

Answer 29

When rate of change of velocity remains constant

Question 30

Initial Velocity

Answer 30

Velocity at beginning of motion

Question 31

Final Velocity

Answer 31

Velocity at end of motion