Explanation

Explanation

Explanation

• Tungsten is very resistant to corrosion and has the highest melting point (melting point = 3695 K) and the highest tensile strength of any element.
• Tungsten is used for making bulb filaments of incandescent lamps because it has the highest melting point and does not melt even while it is glowing for long hours.

Explanation

One degree of latitude is approximately 111 km everywhere, but it varies slightly: about 110.6 km at the equator and 111.7 km at the poles.

Lines of longitude, or meridians, run north-south.

Explanation

Commutators and brushes are recommended for high DC voltage generators because they produce sparks.

This happens due to the intermittent contact, which helps in maintaining unidirectional current flow but requires careful management to avoid excessive sparking and wear.

Explanation

In a gasoline vehicle, a capacitor/spark plug tends to prevent an arc at the contacts.

The capacitor is often part of the ignition system.

It helps suppress electrical noise and ensures smoother operation of the ignition system by minimizing arcing.

Explanation

Optics is the branch of physics that studies light and its interactions with matter.

It including phenomena such as reflection, refraction, and dispersion.

Explanation

• Derived quantities are quantities that can be expressed in terms of fundamental quantities through multiplication, division, or raising to a power.
• Examples of derived quantities include area, volume, velocity, acceleration, force, and energy.
• These quantities are derived from the fundamental quantities and are not independent.

Explanation

• A series circuit is a circuit that provides only one path for the current to flow.
• If one component is removed or fails, the entire circuit is interrupted.

Explanation

• Frequency is the number of vibrations or oscillations produced by a vibrating body in one second.
• It's measured in Hertz (Hz), where 1 Hz equals one vibration per second.