Express each of these ideas as a compound.

1. a board consisting of a number of panels

2. material that does not allow water to get into it

3. material that doesn't allow rain to get into it

4. a board consisting of a number of electrical switches

5. conductors which are perfect, conducting a current without a battery

6. material that will not be damaged in an explosion

7. current which is greater than the load for which the system or mechanism was intended

8. material that does not allow dust to get into it

1. a board consisting of a number of panels
In compound form: a panel board

Explanation: This compound describes a type of board that is made up of multiple panels.

2. material that does not allow water to get into it
In compound form: waterproof material

Explanation: This compound refers to a substance or material that is resistant to water penetration.

3. material that doesn't allow rain to get into it
In compound form: rainproof material

Explanation: This compound describes a substance or material that is impervious to rain.

4. a board consisting of a number of electrical switches
In compound form: a switchboard

Explanation: This compound refers to a board that contains multiple electrical switches.

5. conductors which are perfect, conducting a current without a battery
In compound form: batteryless conductors

Explanation: This compound describes conductors that are capable of carrying electric current without the need for a battery.

6. material that will not be damaged in an explosion
In compound form: explosion-proof material

Explanation: This compound refers to a substance or material that is resistant to damage caused by an explosion.

7. current which is greater than the load for which the system or mechanism was intended
In compound form: overload current

Explanation: This compound describes an electrical current that exceeds the intended load or capacity of a system or mechanism.

8. material that does not allow dust to get into it
In compound form: dustproof material

Explanation: This compound describes a substance or material that prevents the entry of dust.