Practice Set 1
Three harmonic waves having equal frequency v and same intensity I0, have phase angles 0, π/4 and – π/4 respectively. When they are superimposed the intensity of the resultant wave is close to :
23
Sep
Three harmonic waves having equal frequency v and same intensity I0, have phase angles 0, π/4 and – π/4 respectively. When they are superimposed the intensity of the resultant wave is close to : have phase angles 0 Three harmonic waves having equal frequency v and same intensity I0 π/4 and – π/4 respectively. When [...]
Three solid spheres each of mass m and diameter d are stuck together such that the lines connecting the centres form an equilateral triangle of side of length d. The ratio I0/IA of moment of inertia I0 of the system about an axis passing the centroid and about center of any of the spheres IA and perpendicular to the plane of the triangle is
23
Sep
Three solid spheres each of mass m and diameter d are stuck together such that the lines connecting the centres form an equilateral triangle of side of length d. The ratio I0/IA of moment of inertia I0 of the system about an axis passing the centroid and about center of any of the spheres IA [...]
Consider a sphere of radius R which carries a uniform charge density ρ. If a sphere of radius R/2 is carved out of it, as shown, the ratio vector|EA/EB| of magnitude of electric field vector EA and vector EB, respectively, at points A and B due to the remaining portion is :
23
Sep
Consider a sphere of radius R which carries a uniform charge density ρ. If a sphere of radius R/2 is carved out of it, as shown, the ratio vector|EA/EB| of magnitude of electric field vector EA and vector EB, respectively, at points A and B due to the remaining portion is : as shown at [...]
Radiation, with wavelength 6561 Å falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 × 10^–4 T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to
23
Sep
Radiation, with wavelength 6561 Å falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 × 10^–4 T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to Radiation Which of [...]
A vessel of depth 2h is half filled with a liquid of refractive index 2√2 and the upper half with another liquid of refractive index √2. The liquids are immiscible. The apparent depth of the inner surface of the bottom of vessel will be :
23
Sep
A vessel of depth 2h is half filled with a liquid of refractive index 2√2 and the upper half with another liquid of refractive index √2. The liquids are immiscible. The apparent depth of the inner surface of the bottom of vessel will be : Which of the following gives a reversible operation? September 23, [...]
A particle moving with kinetic energy E has de Broglie wavelength λ. If energy ΔE is added to its energy, the wavelength become λ/2. Value of ΔE, is :
23
Sep
A particle moving with kinetic energy E has de Broglie wavelength λ. If energy ΔE is added to its energy, the wavelength become λ/2. Value of ΔE, is : A particle moving with kinetic energy E has de Broglie wavelength λ. If energy ΔE is added to its energy is the wavelength become λ/2. Value [...]
A charged particle of mass ‘m’ and charge ‘q’ moving under the influence of uniform electric field E vector i and a uniform magnetic field B vector k follows a trajectory from point P to Q as shown in figure. The velocities at P and Q are respectively, v i and -2v j. Then which of the following statements (A, B, C, D) are the correct ? (Trajectory shown is schematic and not to scale) :
23
Sep
A charged particle of mass ‘m’ and charge ‘q’ moving under the influence of uniform electric field E vector i and a uniform magnetic field B vector k follows a trajectory from point P to Q as shown in figure. The velocities at P and Q are respectively, v i and -2v j. Then which [...]
Two particles of equal mass m have respective initial velocities ui and u((i + j)/2). They collide completely inelastically. The energy lost in the process is :
23
Sep
Two particles of equal mass m have respective initial velocities ui and u((i + j)/2). They collide completely inelastically. The energy lost in the process is : Two particles of equal mass m have respective initial velocities ui and u((i + j)/2). They collide completely inelastically. The energy lost in the process is : September [...]
Consider two ideal diatomic gases A and B at some temperature T. Molecules of the gas A are rigid, and have a mass m. Molecules of the gas B have an additional vibrational mode, and have a mass m/4. The ratio of the specific heats (CAV and CBV ) of gas A and B, respectively is :
23
Sep
Consider two ideal diatomic gases A and B at some temperature T. Molecules of the gas A are rigid, and have a mass m. Molecules of the gas B have an additional vibrational mode, and have a mass m/4. The ratio of the specific heats (CAV and CBV ) of gas A and B, respectively [...]
The first member of the Balmer series of hydrogen atom has a wavelength of 6561 Å. The wavelength of the second member of the Balmer series (in nm) is:
23
Sep
The first member of the Balmer series of hydrogen atom has a wavelength of 6561 Å. The wavelength of the second member of the Balmer series (in nm) is: The first member of the Balmer series of hydrogen atom has a wavelength of 6561 Å. The wavelength of the second member of the Balmer series [...]