Measurements & Scientific Instruments
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Q61.The theory of Expanding Universe was first propounded by____?
Correct Answer: D
Edwin Hubble's observations of galactic redshift in the 1920s led him to propose that the universe is expanding.
Q62.Who first measured the velocity of light?
Correct Answer: C
Danish astronomer Ole Rømer was the first to measure the speed of light, in 1676, using observations of Jupiter's moons.
Q63.‘Bar’ is the unit of____?
Correct Answer: C
The bar is a unit of pressure, roughly equal to atmospheric pressure at sea level.
Q64.1 BTU(British thermal unit) is equal to____?
Correct Answer: C
One BTU (British Thermal Unit) is equal to approximately 1,055 joules of energy.
Q65.746 watts are equivalent to____?
Correct Answer: C
746 watts is equivalent to 1 horsepower (HP), the standard conversion used in mechanics and engineering.
Q66.According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in____?
Correct Answer: C
A 100-watt bulb uses 1 kWh (one 'unit') of electricity after running for 10 hours (100W × 10h = 1000Wh = 1kWh).
Q67.Analytical solutions to Quadratic equations were introduced by____?
Correct Answer: A
The 9th-century mathematician Al-Khwarizmi is credited with introducing systematic analytical (algebraic) solutions to quadratic equations.
Q68.BTU is a unit of____?
Correct Answer: C
BTU (British Thermal Unit) is a unit of heat energy.
Q69.Calculus was invented by____?
Correct Answer: C
Calculus is credited to Sir Isaac Newton (developed independently alongside Gottfried Leibniz).
Q70.Candela is the basic unit of____?
Correct Answer: A
The candela is the SI base unit of luminous intensity.
Q71.Curie is a unit of measuring the intensity of ____?
Correct Answer: A
Curie is an unit of measuring the intensity of Radioactivity. This value follows from the standard definition or accepted conversion used for the quantity.
Q72.Cusec is a unit of ____?
Correct Answer: D
Cusec is an unit of None of these. This value follows from the standard definition or accepted conversion used for the quantity.
Q73.Dioptre is a unit of measurement for ____ ?
Correct Answer: B
Dioptre is an unit of measurement for Lens. This value follows from the standard definition or accepted conversion used for the quantity.
Q74.Elephant” large unit of paper measurement equal to 28 by____
Correct Answer: A
Elephant” large unit of paper measurement equal to 28 by 23 inches. This value follows from the standard definition or accepted conversion used for the quantity.
Q75.Farad is the unit of____?
Correct Answer: C
Farad is the unit of capacitance. This value follows from the standard definition or accepted conversion used for the quantity.
Q76.Fathom is the unit of measurement for____?
Correct Answer: B
Fathom is the unit of measurement for Depth. This value follows from the standard definition or accepted conversion used for the quantity.
Q77.In BTU system, one BTU is equal to____?
Correct Answer: C
In BTU system, one BTU is equal to 2155 Joule. This value follows from the standard definition or accepted conversion used for the quantity.
Q78.Kilowatt-hour is a unit of____?
Correct Answer: C
Kilowatt-hour is an unit of Energy. This value follows from the standard definition or accepted conversion used for the quantity.
Q79.Lux is a unit of ____?
Correct Answer: B
Lux is an unit of Illumination. This value follows from the standard definition or accepted conversion used for the quantity.
Q80.Newton metre is a unit of ____.
Correct Answer: C
Newton metre is an unit of torque. This value follows from the standard definition or accepted conversion used for the quantity.