Physics-
General
Easy
Question
A disc of mass m and radius R is moving on a horizontal surface. If force F is acting on the disc. Then find the angular acceleration of disc
The correct answer is:
Related Questions to study
Physics-
Two dielectrics of equal size are inserted inside a parallel plate capacitor as shown. With what factor the effective capacitance increases ?
Two dielectrics of equal size are inserted inside a parallel plate capacitor as shown. With what factor the effective capacitance increases ?
Physics-General
Physics-
A capacitor of capacitance C is connected to a cell of emf V and when fully charged, it is disconnected. Now the separation between the plates is doubled. The change in flux of electric field through a closed surface enclosing the capacitor is
A capacitor of capacitance C is connected to a cell of emf V and when fully charged, it is disconnected. Now the separation between the plates is doubled. The change in flux of electric field through a closed surface enclosing the capacitor is
Physics-General
Physics-
An electron in Bohr’s hydrogen atom has an energy of –3.4 eV. The angular momentum of the electron is
An electron in Bohr’s hydrogen atom has an energy of –3.4 eV. The angular momentum of the electron is
Physics-General
Physics-
To decrease the cut-off wavelength of continuous X-ray by 25% the potential difference across the X-ray tube
To decrease the cut-off wavelength of continuous X-ray by 25% the potential difference across the X-ray tube
Physics-General
Physics-
An electron in hydrogen atom first jumps from second excited state to first excited state and then from first excited state to ground state. Let the ratio of wavelength, momentum and energy of photons emitted in these two cases be a, b and c respectively. Then
An electron in hydrogen atom first jumps from second excited state to first excited state and then from first excited state to ground state. Let the ratio of wavelength, momentum and energy of photons emitted in these two cases be a, b and c respectively. Then
Physics-General
Physics-
The relation between half-life T of a radioactive sample and its mean life t is:
The relation between half-life T of a radioactive sample and its mean life t is:
Physics-General
Chemistry-
Statement 1:Polybutadiene is an example of step-growth polymer
Statement 2:Copolymerisation of butadiene and acrylonitrile gives Buna-N
Statement 1:Polybutadiene is an example of step-growth polymer
Statement 2:Copolymerisation of butadiene and acrylonitrile gives Buna-N
Chemistry-General
Chemistry-
Statement 1:Bakelite is a thermosetting plastic.
Statement 2:In thermosetting plastics, the polymeric chains are held together by strong covalent bonds.
Statement 1:Bakelite is a thermosetting plastic.
Statement 2:In thermosetting plastics, the polymeric chains are held together by strong covalent bonds.
Chemistry-General
Chemistry-
The interparticle forces between linear chains in Nylon-6, 6 are:
The interparticle forces between linear chains in Nylon-6, 6 are:
Chemistry-General
Chemistry-
Free radical polymerisation requires a free radical initiator. The most commonly used free radical initiator is:
Free radical polymerisation requires a free radical initiator. The most commonly used free radical initiator is:
Chemistry-General
Maths-
A ray of light passing through the point A (1, 2) is reflected at a point B on the x-axis and then passes through (5, 3) Then the equation of AB is
A ray of light passing through the point A (1, 2) is reflected at a point B on the x-axis and then passes through (5, 3) Then the equation of AB is
Maths-General
Chemistry-
Which of the following is the polymers can be used for lubrication and as an insulator?
Which of the following is the polymers can be used for lubrication and as an insulator?
Chemistry-General
Chemistry-
Number-average molecular mass of a polymer is determined by:
Number-average molecular mass of a polymer is determined by:
Chemistry-General
Chemistry-
Nylon-6 is prepared from:
Nylon-6 is prepared from:
Chemistry-General
Chemistry-
Carbonation of methyl magnesium bromide gives an organic compound This compound is also obtained by
Carbonation of methyl magnesium bromide gives an organic compound This compound is also obtained by
Chemistry-General
