Pakistan MCQs

Photovoltaic materials release charge carriers when illuminated.
The device generates direct electric current.

Hydropower turbines are driven by flowing or falling water.
Generators convert the turbine's motion into electricity.

Earth's internal heat warms rocks and underground water.
It can provide heating or generate electricity.

Tectonic stress builds in Earth's crust.
When rocks slip, seismic waves spread from the rupture.

A seismograph detects and records vibrations of the ground.
The resulting record is called a seismogram.

The focus is the underground rupture origin.
The epicenter is its surface projection.

Undersea earthquakes, landslides, or eruptions can displace large water volumes.
The resulting waves can grow near coastlines.

Volcanoes connect Earth's surface with molten or gaseous material below.
Eruptions vary from gentle lava flows to explosive ash events.

Magma is molten rock below the surface.
Once erupted, it is called lava.

Plasmodium parasites cause malaria.
They are transmitted mainly by infected female Anopheles mosquitoes.

Catalytic converters promote reactions that reduce carbon monoxide, hydrocarbons, and nitrogen oxides.
They require suitable operating temperature.

Tuberculosis is a bacterial disease, often affecting the lungs.
It spreads through airborne droplets.