Science GK Practice Question and Answer
8 Q: What is the coupling of primary and secondary coils in a transformer?
1728 05ef4495d2d6fc772f50b8ceb
5ef4495d2d6fc772f50b8ceb- 1Electricalfalse
- 2Mechanicalfalse
- 3Magnetictrue
- 4All thesefalse
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Answer : 3. "Magnetic"
Explanation :
The secondary coil is also generating a magnetic field that is growing and shrinking just like the field in the primary coil. This coupling of magnetic energy between these two coils is called mutual induction.
Q: Which gas is used to purify pond water in cities?
1717 0601401905beea84b8ecebc42
601401905beea84b8ecebc42- 1Sulfur dioxidefalse
- 2Chlorinetrue
- 3Nitrogenfalse
- 4Ammoniafalse
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Answer : 2. "Chlorine"
Q: Water drops are spherical because of ? 1714 05c2dc0d094bba731de8f0a36
5c2dc0d094bba731de8f0a36- 1viscosityfalse
- 2densityfalse
- 3polarityfalse
- 4surface tensiontrue
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Answer : 4. "surface tension"
Q: capacitor is a of small size but high capacity?
1703 15ef44ae3f2ebd073795bbd97
5ef44ae3f2ebd073795bbd97- 1mica capacitortrue
- 2electrolytic capacitorsfalse
- 3Sirasic capacitorfalse
- 4Paper capacitorfalse
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Answer : 1. "mica capacitor"
Q: Rust on iron?
1700 05f9101807793eb35d72c610c
5f9101807793eb35d72c610c- 1ferric oxidefalse
- 2Hydrated ferrous and ferric oxidefalse
- 3Alkali ferrous and ferric carbonatefalse
- 4Because of all of the abovetrue
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Answer : 4. "Because of all of the above"
Q: Which of the following protocols is not correctly related to its issue?
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5f60453380a26b7dab000e70- 11987 Montreal Protocol - Ozone Depleting Substancesfalse
- 21979 Bone Conference - Conservation of Migratory Speciesfalse
- 31989 Basel Convention - Regulation of transboundary movement, transit, handling and use of living modified organismstrue
- 41998 Rotterdam Conference - Consent in the international trade of some hazardous chemicals and pesticidesfalse
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Answer : 3. "1989 Basel Convention - Regulation of transboundary movement, transit, handling and use of living modified organisms"
Q: Electricity is generated when the drivers rotate between the magnetic fields?
1674 05ef44b332d6fc772f50b9337
5ef44b332d6fc772f50b9337- 1Movingtrue
- 2stablefalse
- 3Both static and dynamicfalse
- 4None of thesefalse
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Answer : 1. "Moving"
Explanation :
In a generator, a rotating magnetic field is used to produce electrical energy. When a conductor, such as a wire, moves through a magnetic field, a voltage is induced across the conductor. This is known as electromagnetic induction, and it is the fundamental principle behind how generators work.
Q: Potato canker has black canker and black pan / colloid factor?
1668 0604ddf1aa01bc447899e2174
604ddf1aa01bc447899e2174- 1two fungifalse
- 2A fungus and a bacteriumfalse
- 3a fungustrue
- 4A fungus and a virusfalse
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