Science & Technology Basics

Georg Simon Ohm discovered the concept of electrical resistance and formulated Ohm's Law, which states that the current through a conductor is directly proportional to the voltage across it. This fundamental relationship was established in 1827. Volta invented the electric battery, Fermi was a nuclear physicist, and Kamerlingh Onnes discovered superconductivity, not resistance.

Resistivity is an intrinsic property of a material that measures its ability to oppose electric current flow. It is independent of the material's dimensions and depends only on the material's composition and temperature. The correct definition states that resistivity measures the opposition to current, not the disposal or increase of current. Options A, B, and C incorrectly describe resistivity as facilitating current rather than opposing it.

Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, with the constant of proportionality being the resistance (R). The correct formula is R = V/I, which can be rearranged to V = IR. Option A has the division reversed, option B multiplies V and I incorrectly, and option D has V squared which is incorrect.

This statement is FALSE. The resistance of a wire is directly proportional to its length - as length increases, resistance increases. This is because electrons have to travel through more material, encountering more collisions. Resistance = ρL/A, where L is length - longer L means larger R. The answer correctly identifies this as False.

The claim that all polar bears are right-handed is a myth with no scientific basis. Polar bears, like most animals, show individual variation in paw preference and are not universally right-handed. This myth likely originated from anecdotal observations but has been debunked by scientific research.

Mosquitoes do have teeth - specifically, they have a serrated proboscis with 47 sharp teeth used to cut through skin. This adaptation allows them to penetrate skin efficiently to access blood vessels. The teeth are microscopic structures on their mouthparts.

The legs are not the body's strongest muscle. The masseter (jaw muscle) is considered the strongest based on force exerted, while the gluteus maximus is the largest. The heart is often called the strongest for its endurance. Legs contain multiple muscle groups but no single strongest muscle.

Butterflies do not taste with their wings - they have taste receptors on their feet (tarsi). When they land on plants, they can taste whether it's suitable food or for egg-laying. The wings are primarily for flight and protection.

Graphics, animation, audio, and video are all multimedia OUTPUT elements. 'Video script' is a PLANNING/TEXT document that guides production but is not itself a multimedia element.

Cell animation is the traditional technique for 2D animation where each frame is drawn on a transparent sheet called a cell. The term specifically refers to this frame-by-frame hand-drawn animation method.

JPG is a image file format for photographs, while MP4, AVI, QT, and MOV are all video file extensions. The question asks which is NOT a video file format.