Category: TIFR Previous Year Question Papers 2020 Biology With Answer Key Download

15. A 1-D infinite potential well of width L has a ground-state energy of E1. If the width is doubled to 2L, it now has a ground-state energy E2. Which […]

14. A circuit consists of a battery, a resistor and a reverse-biased Zener diode in series. The battery voltage is greater than the barrier voltage of the diode. Which of […]

13. Two reference frames S and S’ are moving towards each other with relative velocity 3c/4, where c is the speed of light. Now an object in S frame is […]

12. The minimum number of NAND gates required to construct an OR gate is a. 1 b. 2 c. 3 d. 4 The minimum number of NAND gates needed to […]

11. The number of molecules dN with speeds lying between v and v+dv of a classical gas is given by dN = ρ(v) dv. The distribution ρ(v) is shown for […]

10. A multimeter has an internal resistance of 0.5 Ohms while another has an internal resistance of 5×106 Ohms. What use can the two multimeters be best put to? a. […]

9. Light is incident from a medium with refractive index n = 1.72 onto vacuum. The smallest angle of incidence (measured with respect to the normal) for which light is […]

8. A sound wave propagating in a solid block can have the following modes: a. One transverse only b. One longitudinal only c. Two transverse and one longitudinal only d. […]

7. Which one of the geometries of the same mass and radius has the maximum moment of inertia? a. a thin circular disk b. a thin circular ring c. a […]

6. Four discharged capacitors C1, C2, C3 and C4 are connected as shown in the figure. A potential difference is applied between the points X and Y and the system […]