JEE Main Sample Paper Physics by NTA

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_________. Answer : 90 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_____________. Answer : 3 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____________. Answer : 4

Q.4: The binding energy of deutron (1H2) 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 1H2 + 1H2 → 2He4 + Q The energy Q released in MeV is __________ Answer : 23.8 Q.5: Light of wavelength 0.6 mm from a sodium lamp falls on a photo cell 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____________. Answer : 1.5