ANSWER KEYS: NFAT-UG PRACTICE SHEET
PHYSICS:
1. Electromagnetics & Electromagnetic Induction:
a. Faraday's law of electromagnetic induction relates:
iii. Magnetic field and current change.
2. Wave and Optics:
a. Which phenomenon explains the change in direction of light as it passes from one medium to another?
ii. Refraction
3. Fundamental of Nuclear & Atomic Physics:
a. What is the process by which an unstable atomic nucleus emits radiation?
iv. Radioactive decay
4. Semiconductor Electronics:
a. A p-n junction diode:
iii. Allows current flow in one direction only.
5. Thermodynamics:
a. The second law of thermodynamics states that:
iii. The entropy of an isolated system increases over time.
6. Kinematics and Mechanics:
a. Which of the following equations represents the relationship between velocity, acceleration, and time?
i. v = u + at
7. Magnetostatics:
a. The magnetic field produced by a straight current-carrying wire is:
iii. Tangential to the wire.
8. Electrostatics Field and Potential:
a. The electric potential at a point in an electric field depends on:
iv. The presence of other charges.
9. Elements of Modern Physics:
a. Which of the following phenomena provides evidence for the wave-particle duality of light?
i. Photoelectric effect.
10. Electromagnetics & Electromagnetic Induction:
a. What is the relationship between the magnetic field and the electric field in an electromagnetic wave?
i. They are perpendicular to each other.
11. Wave and Optics:
a. The phenomenon of interference occurs when two waves:
ii. Combine to form a single wave.
12. Fundamental of Nuclear & Atomic Physics:
a. Which subatomic particle carries a positive charge and is located in the nucleus of an atom?
i. Proton
13. Semiconductor Electronics:
a. In an n-type semiconductor, the majority charge carriers are:
i. Electrons
14. Thermodynamics:
a. The efficiency of a heat engine is given by:
i. (Output work)/(Input work)
15. Kinematics and Mechanics:
a. What is the acceleration due to gravity on the surface of the Earth?
i. 9.8 m/s^2
16. Magnetostatics:
a. Ampere's law relates the magnetic field around a closed loop to:
i. The electric current passing through the loop.
17. Electrostatics Field and Potential:
a. Gauss's law is a mathematical statement relating:
iii. Electric field and charge distribution.
18. Elements of Modern Physics:
a. Which of the following phenomena supports the concept of wave-particle duality for matter?
i. Electron diffraction.
19. Electromagnetics & Electromagnetic Induction:
a. The unit of magnetic field strength is:
i. Tesla
20. Wave and Optics:
a. What happens to the frequency of a sound wave as the source of the wave moves away from an observer?
ii. It decreases.
CHEMISTRY:
Here are the correct answers to the questions:
1. b) 1s^2 2s^2 2p^4
2. c) Sodium (Na)
3. b) Covalent bonding
4. c) NaCl
5. d) C5H12
6. b) Combustion of gasoline
7. b) The energy required to start a reaction
8. a) Solid
9. b) The concentrations of reactants and products at equilibrium
10. a) Zn
11. c) Chlorine (Cl)
12. d) An alcohol
13. a) Polyethylene
14. c) Sulfur dioxide (SO2)
15. c) The use of an electric current to drive a non-spontaneous chemical reaction
16. a) Silver
17. d) Releases hydrogen ions (H+)
18. a) Condensation of water vapor
19. b) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5
20. a) Vitamin C
BIOLOGY:
1. c. Ability to breathe
2. d. Rose plant
3. d. Ribosome
4. a. Insulin
5. b. Diffusion
6. a. Blue eyes
7. a. Bacteria
8. b. Gel electrophoresis
9. c. Grasshopper
10. c. Carbon dioxide
11. c. Dolphins and fish having streamlined bodies
12. d. Ethanol
13. c. Gene editing
14. c. Sea otter
15. d. Dengue fever
16. c. Photosynthesis
17. a. DNA polymerase
18. d. Ticks and cattle
19. d. Archaea that live in highly saline environments
20. d. Osmosis
MAHEMATICS:
1. Sets & Functions:
The function that is NOT injective (one-to-one) is:
b) f(x) = x^2
2. Algebra:
Given a + b = 5 and ab = 6, the value of a^2 + b^2 is:
c) 15
3. Coordinate Geometry:
The line passing through the points (1, 2) and (4, 6) has the equation:
a) y = 2x + 4
4. Calculus:
The derivative of the function f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 1 is:
a) f'(x) = 12x^3 - 6x^2 + 10x - 7
5. Statistics & Probability:
The probability of getting a sum of 9 when rolling a fair six-sided die twice is:
b) 1/12
6. Vectors & 3D Geometry:
The dot product of two perpendicular vectors is:
b) 0
7. Sets & Functions:
The intersection of set A = {1, 2, 3} and set B = {2, 3, 4} is:
a) {2, 3}
8. Algebra:
The solutions to the equation 2x^2 - 5x + 2 = 0 are:
a) x = 1/2, x = 2
9. Coordinate Geometry:
The distance between the points (3, -2) and (-1, 4) is:
c) 2√13
10. Calculus:
The value of ∫(x^2 + 3x + 2) dx within the interval [0, 2] is:
c) 14
LOGICAL REASONING:
1. c) 3; the half-shaded leaf rotates 135oACW and the unshaded leaf rotates 135oCW.
2. d) 4; The inner element gets enlarged, rotates 45oCW and becomes the outer element. The outer element reduces in size, gets vertically inverted and becomes the inner element.
3. The word that does not belong in the group is "Software." The other three options are hardware components of a computer system.
4. The odd one out in the group is "Triangle." The other three options are all polygons with straight sides, while a triangle has three sides.
5. The word that is most similar in meaning to "abundant" is "plentiful.
ENGLISH GRAMMAR:
1. c) The
2. b) Simile
3. d) Is
4. b) Read
5. d) He said that he will visit me tomorrow.
6. d) The cat chased the mouse.
7. b) Should
8. b) Goes
9. d) Interrogative
10. a) Declarative
CURRENT AFFAIRS:
1. b) Telangana
2. a) Ram Nath Kovind
3. a) New Delhi
4. a) Emmanuelle Charpentier and Jennifer Doudna
5. d) Byju's
6. b) Karnataka
7. a) Mamata Banerjee
8. c) Ashoke Sen
9. c) Nagraj Manjule
10. a) Gaganyaan
COMPUTER SCIENCE:
1. d) Software Applications
2. a) Central Processing Unit
3. c) Keyboard
4. c) ROM (Read-Only Memory)
5. c) To provide search results based on user queries
