Practice Set 1
A thin lens made of glass (refractive index = 1.5) of focal length f = 16 cm is immersed in a liquid of refractive index 1.42. If its focal length in liquid is f1, then the ratio f1/f is closest to the integer :
19
Sep
A thin lens made of glass (refractive index = 1.5) of focal length f = 16 cm is immersed in a liquid of refractive index 1.42. If its focal length in liquid is f1, then the ratio f1/f is closest to the integer : A thin lens made of glass (refractive index = 1.5) of [...]
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m), the kinetic energy of the particle (in J) is : (Figure drawn is schematic and not to scale; take g=10 ms^–2)___.
19
Sep
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m), the kinetic energy of the particle (in J) is [...]
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A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C ,
the kinetic energy of the particle (in J) is : (Figure drawn is schematic and not to scale; take g=10 ms^–2)___. ,
the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m) ,
A non-isotropic solid metal cube has coefficients of linear expansion as : 5 × 10^–5/°C along the x-axis and 5 × 10^–6/°C along the y and the z-axis. If the coefficient of volume expansion of the solid is C × 10^–16/°C then the value of C is ______.
19
Sep
A non-isotropic solid metal cube has coefficients of linear expansion as : 5 × 10^–5/°C along the x-axis and 5 × 10^–6/°C along the y and the z-axis. If the coefficient of volume expansion of the solid is C × 10^–16/°C then the value of C is ______. The correct match between the entries in [...]
A beam of electromagnetic radiation of intensity 6.4 × 10^–5 W/cm^2 is comprised of wavelength, λ = 310 nm. It falls normally on a metal (work function φ = 2eV) of surface area of 1 cm^2. If one in 10^3 photons ejects an electron, total number of electrons ejected in 1 s is 10^x. (hc=1240 eVnm, 1eV=1.6×10^–19 J), then x is ___.
19
Sep
A beam of electromagnetic radiation of intensity 6.4 × 10^–5 W/cm^2 is comprised of wavelength, λ = 310 nm. It falls normally on a metal (work function φ = 2eV) of surface area of 1 cm^2. If one in 10^3 photons ejects an electron, total number of electrons ejected in 1 s is 10^x. (hc=1240 [...]
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1eV=1.6×10^–19 J) ,
A beam of electromagnetic radiation of intensity 6.4 × 10^–5 W/cm^2 is comprised of wavelength ,
then x is ___. ,
total number of electrons ejected in 1 s is 10^x. (hc=1240 eVnm ,
λ = 310 nm. It falls normally on a metal (work function φ = 2eV) of surface area of 1 cm^2. If one in 10^3 photons ejects an electron ,
A loop ABCDEFA of straight edges has six corner points A(0,0,0), B(5,0,0), C(5,5,0), D(0, 5, 0), E(0, 5, 5) and F(0, 0, 5). The magnetic field in this region is vector B = (3i + 4k)T. The quantity of flux through the loop ABCDEFA (in Wb) is ______ .
19
Sep
A loop ABCDEFA of straight edges has six corner points A(0,0,0), B(5,0,0), C(5,5,0), D(0, 5, 0), E(0, 5, 5) and F(0, 0, 5). The magnetic field in this region is vector B = (3i + 4k)T. The quantity of flux through the loop ABCDEFA (in Wb) is ______ . 0 ) 5 5) and F(0 [...]
The radius of gyration of a uniform rod of length l, about an axis passing through a point l/4 away from the centre of the rod, and perpendicular to it, is :
19
Sep
The radius of gyration of a uniform rod of length l, about an axis passing through a point l/4 away from the centre of the rod, and perpendicular to it, is : about an axis passing through a point l/4 away from the centre of the rod and perpendicular to it is The radius of [...]
A Carnot engine operates between two reservoirs of temperatures 900 K and 300 K. The engine performs 1200 J of work per cycle. The heat energy (in J) delivered by the engine to the low temperature reservoir, in a cycle, is____
19
Sep
A Carnot engine operates between two reservoirs of temperatures 900 K and 300 K. The engine performs 1200 J of work per cycle. The heat energy (in J) delivered by the engine to the low temperature reservoir, in a cycle, is____ The correct match between the entries in table are : September 19, 2021 Category: [...]
Three point particles of masses 1.0 kg, 1.5 kg and 2.5 kg are placed at three corners of a right angle triangle of sides 4.0 cm, 3.0 cm and 5.0 cm as shown in the figure. The center of mass of the system is at a point :
19
Sep
Three point particles of masses 1.0 kg, 1.5 kg and 2.5 kg are placed at three corners of a right angle triangle of sides 4.0 cm, 3.0 cm and 5.0 cm as shown in the figure. The center of mass of the system is at a point : 1.5 kg and 2.5 kg are placed [...]
A long solenoid of radius R carries a time dependent current I = I0t(1 – t). A ring of radius 2R is placed coaxially near its centre. During the time interval 0 ≤ t ≤ 1, the induced current IR and the induced emf VR in the ring change as:
19
Sep
A long solenoid of radius R carries a time dependent current I = I0t(1 – t). A ring of radius 2R is placed coaxially near its centre. During the time interval 0 ≤ t ≤ 1, the induced current IR and the induced emf VR in the ring change as: A long solenoid of radius [...]
A polarizer – analyser set is adjusted such that the intensity of light coming out of the analyser is just 10% of the original intensity. Assuming that the polarizer – analyser set does not absorb any light, the angle by which the analyser need to be rotated further to reduce the output intensity to be zero, is :
19
Sep
A polarizer – analyser set is adjusted such that the intensity of light coming out of the analyser is just 10% of the original intensity. Assuming that the polarizer – analyser set does not absorb any light, the angle by which the analyser need to be rotated further to reduce the output intensity to be [...]