Physics Basics Quiz

False (B)

V = πr²h

<p>second</p> Signup and view all the answers

<p>m = Length s = Time m² = Area m³ = Volume</p> Signup and view all the answers

<p>velocity (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>area = length × breadth</p> Signup and view all the answers

<p>Artificial skin-tanning (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Digital</p> Signup and view all the answers

<p>compressions</p> Signup and view all the answers

<p>Frequency = Number of complete wave cycles per second Wavelength = Distance between two consecutive compressions or rarefactions Rarefaction = Regions where air molecules are less densely packed Compression = Regions where air molecules are densely packed</p> Signup and view all the answers

<p>Cancer detection and treatment (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Total internal reflection</p> Signup and view all the answers

<p>The light undergoes total internal reflection. (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>sin(c) = 1/n</p> Signup and view all the answers

<p>spectrum</p> Signup and view all the answers

<p>Converging Lens = Thickest in the center and bends light inwards Diverging Lens = Thinnest in the center and spreads light out Principal Focus = Point where refracted rays converge Optical Center = The center point of the lens</p> Signup and view all the answers

<p>The angle of refraction increases. (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>It refracts and converges at the principal focus.</p> Signup and view all the answers

<p>v = fλ (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>1500 m/s</p> Signup and view all the answers

<p>frequency</p> Signup and view all the answers

<p>Air = 330-350 m/s Water = 1500 m/s Steel = 5100 m/s Echo method = Formula v = 2d/t</p> Signup and view all the answers

<p>Amplitude (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>v = 2d/t</p> Signup and view all the answers

<p>They repel each other. (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>1.6 × 10⁻¹⁹ C</p> Signup and view all the answers

<p>turns</p> Signup and view all the answers

<p>Electric fields exert forces on charges in the field. (C)</p> Signup and view all the answers

<p>Insulators = Electrons are firmly bound to atoms Conductors = Electrons can move freely</p> Signup and view all the answers

<p>It strengthens the magnetism. (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Towards positive charges (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>ampere</p> Signup and view all the answers

<p>t</p> Signup and view all the answers

The metre (m)

A physical quantity with magnitude only, no direction.

A physical quantity with both magnitude and direction.

The second (s)

Area = length × breadth

Cubic metre (m³)

Geometrically, considering both magnitude and direction.

Distance, speed and mass

The angle of incidence at which the refracted angle is 90 degrees, causing total internal reflection.

When light reflects back into the denser medium, instead of passing through, beyond the critical angle.

A lens that thickens at the center, causing light rays to converge.

A lens that thins at the center, causing light rays to spread out.

The point where parallel light rays meet after passing through a converging lens.

The point from which refracted rays appear to diverge after passing through a diverging lens.

The separation of white light into its component colors.

Light bending twice in a triangular prism, leading to deviation and dispersion.

Signals that use discrete, binary values (0s and 1s) to represent data.

Signals that use continuous variations in amplitude or frequency to represent data.

Longitudinal waves that travel through a medium by causing particles to vibrate back and forth parallel to the wave's direction

Regions in sound waves where air molecules are tightly packed together, leading to higher pressure.

Regions in sound waves where air molecules are spread further apart, leading to lower pressure.

The number of complete wave cycles per second of a sound wave.

The distance between two consecutive compressions or rarefactions in a sound wave.

Fibers that use total internal reflection to transmit infrared light

A region in space where a charged object experiences a force due to the presence of other charges. This force is caused by the interaction of electric fields.

A region where the electric field strength and direction are constant throughout. Usually found between two oppositely charged parallel plates.

The rate of flow of electric charge past a point in a circuit.

The SI unit of electric current. One ampere is defined as the flow of one coulomb of charge per second.

The SI unit of electric charge. One coulomb is the charge passing a point when a steady current of one ampere flows for one second.

The speed of sound (v) is calculated by multiplying the frequency (f) of the sound wave by its wavelength (λ): v = fλ

Humans can hear sounds within a specific frequency range, typically between 20Hz (low pitch) and 20,000Hz (high pitch).

The ability to hear sound is influenced by its frequency (pitch) and intensity (loudness).

Sound waves bounce off hard, smooth surfaces, similar to how light reflects off a mirror.

At room temperature, sound travels through air at approximately 330-350 meters per second.

A temporary magnet created by passing an electric current through a coil of wire wrapped around a core of soft iron.

A technique to measure the speed of sound using echoes. Measure the distance to a reflective surface and the time it takes for sound to travel to the surface and back.

The strength of an electromagnet depends on the current flowing through the coil, the number of turns in the coil, and the distance between the magnetic poles.

A method to measure the speed of sound by detecting the time it takes for sound to travel between two microphones placed a known distance apart.

The pitch of a musical note is determined by the frequency of the sound wave. Higher frequencies result in higher-pitched notes.

Charges with the same sign (+ and + or - and -) repel each other.

Charges with opposite signs (+ and -) attract each other.

The force experienced by charges when they are near each other.

The basic building block of matter, composed of a positively charged nucleus surrounded by negatively charged electrons.

A material that resists the flow of electricity because its electrons are tightly bound to atoms.

A material that allows electricity to flow easily because its electrons can move freely.