grade 10

Front

What is hydroelectric energy?

Back

Hydroelectric energy is electricity generated by harnessing the power of flowing water, typically from rivers or dams, without producing heat.

Front

What is the unit of density?

Back

The unit of density is grams per cubic centimeter (g/cm³).

Front

What is radioactive decay?

Back

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, resulting in the transformation of the atom into a different element or isotope.

Front

What is a relay in electrical circuits?

Back

A relay is an electromechanical switch that allows a small direct current (d.c.) to control a larger direct current (d.c.) circuit.

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

What is the difference between direct current (d.c.) and alternating current (a.c.)?

Back

Direct current (d.c.) flows in one direction, while alternating current (a.c.) changes direction periodically.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.

Front

What is the role of a generator?

Back

A generator converts mechanical energy into electrical energy.