Practice Set 1
A metallic sphere cools from 50°C to 40°C in 300 s. If atmospheric temperature around is 20°C, then the sphere’s temperature after the next 5 minutes will be close to
18
Sep
A metallic sphere cools from 50°C to 40°C in 300 s. If atmospheric temperature around is 20°C, then the sphere’s temperature after the next 5 minutes will be close to A metallic sphere cools from 50°C to 40°C in 300 s. If atmospheric temperature around is 20°C then the sphere’s temperature after the next 5 [...]
A calorimeter of water equivalent 20 g contains 180 g of water at 25°C. ‘m’ grams of steam at 100°C is mixed in it till the temperature of the mixture is 31°C. The value of ‘m’ is close to (Latent heat of water = 540 cal g^–1, specific heat of water = 1 cal g^–1 °C^–1)
18
Sep
A calorimeter of water equivalent 20 g contains 180 g of water at 25°C. ‘m’ grams of steam at 100°C is mixed in it till the temperature of the mixture is 31°C. The value of ‘m’ is close to (Latent heat of water = 540 cal g^–1, specific heat of water = 1 cal g^–1 [...]
A block of mass m attached to a massless spring is performing oscillatory motion of amplitude ‘A’ on a frictionless horizontal plane. If half of the mass of the block breaks off when it is passing through its equilibrium point, the amplitude of oscillation for the remaining system become fA. The value of f is
18
Sep
A block of mass m attached to a massless spring is performing oscillatory motion of amplitude ‘A’ on a frictionless horizontal plane. If half of the mass of the block breaks off when it is passing through its equilibrium point, the amplitude of oscillation for the remaining system become fA. The value of f is
Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first wave travels a path L1 through a medium of refractive index n1 while the second wave travels a path of length L2 through a medium of refractive index n2. After this the phase difference between the two waves is
18
Sep
Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first wave travels a path L1 through a medium of refractive index n1 while the second wave travels a path of length L2 through a medium of refractive index n2. After this the phase difference between the two waves [...]
A perfectly dimagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field B . Then the field inside the paramagnetic substance is:
18
Sep
A perfectly dimagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field B . Then the field inside the paramagnetic substance is: A perfectly dimagnetic sphere has a small spherical cavity at its centre which is filled with [...]
Two resistors 400Ω and 800Ω are connected in series with a 6V battery. The potential difference measured by voltmeter of 10k ? across 400Ω resistor is
18
Sep
Two resistors 400Ω and 800Ω are connected in series with a 6V battery. The potential difference measured by voltmeter of 10k ? across 400Ω resistor is Two resistors 400Ω and 800Ω are connected in series with a 6V battery. The potential difference measured by voltmeter of 10k ? across 400Ω resistor is September 18, 2021 [...]
A particle is moving unidirectionally on a horizontal plane under the action of a constant power supplying energy source. The displacement (s) – time (t) graph that describes the motion of the particle is (graphs are drawn schematically and are not to scale)
18
Sep
A particle is moving unidirectionally on a horizontal plane under the action of a constant power supplying energy source. The displacement (s) – time (t) graph that describes the motion of the particle is (graphs are drawn schematically and are not to scale) A balloon filled with helium (32°C and 1.7 atm.) bursts. Immediately afterwards [...]
The mass density of a planet of radius R varies with the distance r from its centre as ρ(r) = ρ0 (1 – r^2/R^2 ). Then the gravitational field is maximum at
18
Sep
The mass density of a planet of radius R varies with the distance r from its centre as ρ(r) = ρ0 (1 – r^2/R^2 ). Then the gravitational field is maximum at The mass density of a planet of radius R varies with the distance r from its centre as ρ(r) = ρ0 (1 - [...]
Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference V(R) – V(4R) is
18
Sep
Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference V(R) – V(4R) is Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that surface charge densities of the [...]
A bakelite beaker has volume capacity of 500 cc at 30°C. When it is partially filled with Vm volume (at 30°C) of mercury, it is found that the unfilled volume of the beaker remains constant as temperature is varied. If γ(beaker) = 6 × 10^–6°C–1 and γ(mercury) = 1.5 10^-4 °C-1 , where γ is the coefficient of volume expansion, then Vm (in cc) is close to ___________.
18
Sep
A bakelite beaker has volume capacity of 500 cc at 30°C. When it is partially filled with Vm volume (at 30°C) of mercury, it is found that the unfilled volume of the beaker remains constant as temperature is varied. If γ(beaker) = 6 × 10^–6°C–1 and γ(mercury) = 1.5 10^-4 °C-1 , where γ is [...]
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A bakelite beaker has volume capacity of 500 cc at 30°C. When it is partially filled with Vm volume (at 30°C) of mercury ,
it is found that the unfilled volume of the beaker remains constant as temperature is varied. If γ(beaker) = 6 × 10^–6°C–1 and γ(mercury) = 1.5 10^-4 °C-1 ,
then Vm (in cc) is close to ___________. ,
where γ is the coefficient of volume expansion ,