CSS General Knowledge MCQs

Mixture components retain many of their own properties.
They can often be separated by physical methods.

Bats emit high-frequency sound pulses and detect returning echoes.
This helps them navigate and locate prey.

Electric current measures charge passing a point per unit time.
Its SI unit is the ampere.

Electric current is measured in amperes.
An ampere equals one coulomb of charge per second.

Voltage represents energy transferred per unit charge.
It drives current through a circuit.

Resistance is measured in ohms.
It describes opposition to electric current.

Copper contains mobile electrons that carry current easily.
It is widely used in electrical wiring.

Plastic resists the movement of electric charge.
The covering protects users from electric shock.

A fuse melts when excessive current heats it.
This interrupts the circuit and helps prevent fire or damage.

Parallel branches have the same potential difference.
Switching off one appliance does not stop current in the others.

At boiling, vapor bubbles form throughout the liquid.
It occurs when vapor pressure matches external pressure.

Sunlight travels through more atmosphere near the horizon.
Much of the shorter-wavelength light is scattered away.