NEET questions
18092 published questions with worked solutions.
- The wettability of a surface by a liquid depends primarily on -
- The molar specific heats of an ideal gas at constant pressure and volume are denoted by C_p and C_v, respectively. If = C_p C_v...
- A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The...
- The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T_1 K to T_2 K is -
- A wave travelling in the +ve x-direction having displacement along y-direction as 1 m, wavelength 2 m and frequency of 1 Hz is...
- If we study the vibration of a pipe open at both ends, then the following statement is not true -
- A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the...
- The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 is -
- The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The...
- When a proton is released from rest in a room, it starts with an initial acceleration a_0 towards west. When it is projected...
- A current loop in a magnetic field -
- A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is -
- A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when -
- The half-life of a radioactive isotope X is 20 years. It decays to another element Y which is stable. The two elements X and Y...
- A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 u. The...
- For photoelectric emission from certain metal the cutoff frequency is . If radiation of frequency 2 impinges on the metal plate,...
- The wavelength _e of an electron and _p of a photon of same energy E are related by -
- A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made...
- For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the...
- In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths _1 = 12000 and _2 =...