10 - அறிவியல் - இயற்பியல் - 17.

The blank in the sentence is filled by the phrase "எண் மதிப்பும் திசையும்" which means "both the numerical value and the direction". Therefore, the complete sentence translates to "Momentum is measured by both the numerical value and the direction."

The correct answer is "காந்தப்புலம் எண்மதிப்பும், திசையும் கொண்ட அளவு." This answer states that the correct measurement of a vector includes both magnitude and direction. The other options only consider either the magnitude or the direction, but not both.

The rotating magnet in the electric motor creates a magnetic field that interacts with the stationary coil of wire, inducing a current in the coil. This current then generates a magnetic field that opposes the original magnetic field, causing the coil to rotate. Therefore, the correct answer is "காந்தப்புலம்" which means "magnet" in English.

The given question is asking for a word that is related to "குவியத்தொலைவு" (headphones) similar to how "மீட்டர்" (meter) is related to "நிரப்புக" (measure). Among the given options, "டயாப்டர்" (adapter) is the most suitable answer as it is a device used to connect different types of audio equipment, just like headphones are a type of audio equipment.

When a magnetic field is passed through a coil, it induces an electric current in the coil. This phenomenon is known as electromagnetic induction. In this case, when a compass needle is brought close to a current-carrying wire, the magnetic field produced by the current causes the needle to deflect. This deflection of the compass needle is called "மின்காந்தத் தூண்டல்" or "magnetic deflection". Therefore, the correct answer is "மின்காந்தத் தூண்டல்".

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The given question is asking about the direction in which the needle of a compass points when placed near a magnetic field. The correct answer, "காந்தப்புல திசை" (Kaanthappula dishai), translates to "north direction" in English. This means that the needle of a compass points towards the north when placed near a magnetic field.

The correct answer is "குவிலென்ஸ்". This is because the phrase "தூரப்பார்வை குறையை சரிசெய்ய" means "to reduce nearsightedness" in English. The word "குவிலென்ஸ்" refers to "contact lenses" which are commonly used to correct nearsightedness. Therefore, it is logical to conclude that "குவிலென்ஸ்" is the correct answer.

The correct answer is "காந்தவிசைக்கோடுகள் காந்த வட முனையில் தொடங்கி தென்முனையில் முடியும்." This is because the sentence states that the musical notes start from the north side of the staff and end in the south side.

The correct answer is "இரு குவிய லென்ஸ்" which means "Bifocal lens" in English. This type of lens is designed with two distinct optical powers, allowing the wearer to see clearly at both near and far distances. It is commonly used by individuals with presbyopia, a condition that affects the ability to focus on close objects.

The correct answer is "குழிலென்ஸ்". This is because the given phrase "கிட்டப்பார்வை குறையைச் சரிசெய்ய" means "to reduce the visibility" or "to make something less visible". The word "குழிலென்ஸ்" refers to "lens" in English, which is an optical device that can be used to reduce the visibility or clarity of an object. Therefore, "குழிலென்ஸ்" is the appropriate word that fits the meaning of the phrase.

The question states that there is a lens located at a distance of 10 cm from a screen, and the image formed by the lens is at a distance of 25 cm from the screen. The focal length of the lens can be calculated using the lens formula: 1/f = 1/v - 1/u, where f is the focal length, v is the distance of the image from the lens, and u is the distance of the object from the lens. By substituting the given values into the formula, we can find that the focal length is 16.66 cm. Therefore, the correct answer is 16.66 cm.

The correct answer is "நீள் வளைய ஆடி" which means "Long jump dance" in English.

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The correct answer is AC. The reason for this is that AC (Alternating Current) is the type of current that is used in most household electrical systems. It is the type of current that is supplied by power companies and is used to run appliances and devices in our homes. DC (Direct Current) is another type of current, but it is not commonly used in household electrical systems. Therefore, when it comes to transmitting electricity to remote areas, it is important to use AC as it is more suitable for long-distance transmission.

The correct answer states that the electric motor changes the direction of rotation by changing the direction of the magnetic field. This is a common method used in electric motors to control the direction of rotation.

விண்மீன்கள் மின்னுதல் பெரிய அளவிலான வளி மண்டல ஒளிவிலகல் ஆல் தோன்றுவதாகும். This means that fish are attracted to the reflection of light on the water surface. Therefore, the correct answer is "வளி மண்டல ஒளிவிலகல்" which translates to "reflection of light on the water surface".

The correct answer is "குவி". The question asks for the type of movement that occurs in a circle, with the given information that the circumference is divided into thirds. "குவி" is the Tamil word for "rotation" or "revolution", which accurately describes the movement in a circle.

The focal length of a lens is the distance at which parallel rays of light converge or diverge after passing through the lens. In this case, the given information states that the distance between the lens and the image formed is 2 meters. The negative sign in front of the answer indicates that the image formed is virtual and on the same side as the object. Therefore, the correct answer of -0.5 D suggests that the lens has a focal length of -0.5 diopters, meaning it is a diverging lens.

The given question is in Tamil language and it is asking for the appropriate term for "வாணிப முறையிலான மோட்டார்" (Motor in the form of commerce). The correct term for this is "வாணிப முறையிலான மோட்டார்" and it is given as the answer.