JEE Mains 2021 Physics Sample Paper for Practice
Sample Questions for Section on Numerical Value
Q.1: A particle moves in the x-y plane under the influence of a force such that the linear momentum Is P(t) = A [ î cos kt - ĵ sin kt ] Where A and k are constants.
The angle in degrees between force and momentum is_________.
Q.2: A power line lies along the east-west direction and carries a current of 10 A. The force per meter due to earth's magnetic field of 10-4 T is 10-X N/m.
The value of x is_____________.
Q.3: The sun's disc subtends an angle of 10-2 rad at the earth. The radius of curvature (in meters) of the mirror which will produce on a screen an image of the sun 2 cm in diameter is____________.
Q.4: The binding energy of deuteron (1H 2) is 1.15 MeV per nucleon and an alpha particle ( 2He4 ) has a binding energy of 7.1 MeV per nucleon.
Then in the reaction 1H 2 + 1H 2 → 2He4 + Q The energy Q released in MeV is __________
Q.5: Light of wavelength 0.6 mm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4 mm from a mercury lamp the stopping potential is 1.5 V.
Then, the work function in eV of the photocell surface is____________.