The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹.
The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹. The fractional change in the density of glycerin for a rise of 40⁰ C in its temperature, is
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Questions
The heart of a man pumps 5 litres of blood through the arteries per minute at
The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150mm of mercury. If the intensity of mercury be 13.6 x 10³ kg/m³ and g=10 m/s² […]
The energy of the em waves is of the order of 15 keV. To which part of the spectrum
The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong?
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(a) ultraviolet rays (b) γ-rays (c) X-rays (d) Infra-red rays
Correct […]
The cylindrical tube of a spray pump has radius R, one end of which has n fine holes,
The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed […]
The coefficient of performance of a refrigerator is 5. If the temperature inside
The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20⁰C, the temperature of the surroundings to which it rejects heat is
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(a) 11⁰C (b) 21⁰C (c) […]
Point masses m₁ and m₂ are placed at the opposite ends of a rigid rod of length L,
Point masses m₁ and m₂ are placed at the opposite ends of a rigid rod of length L, and negligible mass. The rod is to be set rotating about an axis perpendicular to it. The […]
On a frictionless surface, a block of mass M moving at speed v collides elastically
On a frictionless surface, a block of mass M moving at speed v collides elastically with another block of same mass M which is infinitely at rest. After collision the first block moves at an […]
Light of wavelength 500 nm is incident on a metal with work function 2.28 eV.
Light of wavelength 500 nm is incident on a metal with work function 2.28 eV. The de Broglie wavelength of the emitted electron is
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(a) ≥2.8×10⁻⁹ m (b) ≤2.8×10⁻¹² m (c) < […]
In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series
In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is
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(a) (27/5) (b) (5/27) (c) (4/9) (d) (9/4)
In the given figure, a diode D is connected to an external resistance R=100 Ω
In the given figure, a diode D is connected to an external resistance R=100 Ω and an e.m.f. of 3.5 V. If the barrier potential developed across the diode is 0.5 V, the current in […]