Category: Everyday Science MCQs Set-5

Correct Answer: B. Mercury Thermometer

The most suitable thermometer for measuring the boiling point of water is a mercury thermometer. Mercury thermometers are commonly used for measuring temperatures within the range of –38°C to 356°C (-36°F to 672°F), making them ideal for measuring the boiling point of water, which is typically around 100°C (212°F) at standard atmospheric pressure. Mercury thermometers provide accurate and reliable readings within this temperature range

Correct Answer: D. Due to attraction of North Pole and Repulsion of Western Pole

The correct answer is D. Due to the attraction of the North Pole and repulsion of the South Pole. This phenomenon is due to the Earth’s magnetic field, which has a north magnetic pole and a south magnetic pole. A magnet, if allowed to move freely, aligns itself with this magnetic field, with its north pole pointing towards the Earth’s geographic north pole and its south pole pointing towards the Earth’s geographic south pole. This behavior is because opposite magnetic poles attract each other, while like poles repel each other

Correct Answer: D. All of these

An electric current can indeed produce various effects. Let’s break down the options:

A. Chemical Effect: Electric current can cause chemical changes in certain materials, such as electrolysis, where a chemical reaction occurs due to the flow of electric current.

B. Magnetic Effect: When electric current flows through a conductor, it generates a magnetic field around it, known as the magnetic effect of electric current.

C. Heating Effect: When electric current passes through a conductor with resistance, such as a filament in a light bulb or a heating element in an electric stove, it generates heat due to the resistance of the material.

Therefore, the correct answer is:

D. All of these: All of the listed options are effects produced by electric currents.