General Knowledge: Physics Questions Answer GK Quiz

Physics Question Answer 2023, Physics Quiz Questions 2023

Q. Food is cooked in a pressure cooker quickly because -
1) Boiling point of water decreases
2) Boiling point of water increases
3) It absorbs heat quickly
4) It retains heat for a longer duration

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Q. A transformer is used to -
1) Increase DC voltage
2) Increase or decrease AC voltage
3) Decrease DC voltage
4) Convert DC into AC

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Q. Convex lenses are used for the correction of -
1) Long-sightedness
2) Short-sightedness
3) Cataract
4) None of these

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Q. When the velocity of a body is doubled -
1) Its K.E. is doubled
2) Its acceleration is doubled
3) Its P.E. is doubled
4) Its momentum is doubled

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Q. A bag is dropped From an aeroplane flying horizontally at a constant speed. Neglecting air resistance, where will the aeroplane be when the bag reaches the ground?
1) Data is not sufficient
2) Behind the bag
3) Ahead of the bag
4) Directly above the bag

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Q. A convex lens has a focal length of 15 cm. At what distance should an object be placed in front of the lens to get a real image of the same size as the object?
1) 15 cm
2) 10 cm
3) 30 cm
4) 40 cm

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Q. The twinkling of a star is due to -
1) atmospheric reflection of starlight
2) atmospheric refraction of starlight
3) continuous change in the position of the star
4) oscillation of starlight

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Q. An object weighs 9 N on the surface of the Earth. What would be its weight, when measured on the surface of a planet where the acceleration due to gravity is 9 times that on the surface of the Earth?
1) The weight would remain the same
2) The weight would be equal to 1 N
3) The weight would become 9 times
4) The weight will be reduced to 1/9 N

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Q. Which one of the following statements is true with regard to the greenhouse?
1) The shorter-wavelength infrared radiations from the Sun can enter into the greenhouse while longer-wavelength infrared radiations from the ground and the plants inside the greenhouse cannot pass back out through the glass
2) The shorter wavelength infrared radiation from the Sun can enter into the greenhouse and the longer wavelength infrared radiation from the ground and the plants inside the greenhouse can also pass back out through the glass
3) The shorter-wavelength infrared radiations from the Sun cannot enter into the greenhouse while longer-wavelength infrared radiations from the ground and the plants inside the greenhouse can pass back out through the glass
4) No infrared radiation can pass through the glass of the greenhouse

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Q. What happens to the gravitational force between two objects if the mass of one object is doubled and the distance between them is also doubled?
1) The force would remain the same
2) The force would be doubled
3) The force would be halved
4) The force would increase by a factor of 4

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