Mock Test

Exam: BPSC Subject: General Science Topic: Physics

Total Questions: 20

Q1. Centripetal force is the force that acts towards the center of a:

straight line plane circular path curved path
Q2. A thin, conducting spherical shell of radius R carries a total charge Q uniformly distributed over its surface. If a point charge -q is placed at the center of the shell, what is the electric field intensity at a distance r < R from the center?

kq/r^2 k(Q-q)/r^2 k(Q-q)/4πϵ₀r^2 Zero
Q3. Two long, parallel wires carrying currents I₁ and I₂ in the same direction are separated by a distance d. The magnetic force per unit length on wire 1 is proportional to:

I₁/d I₁I₂/d I₁I₂/d² I₁/d²
Q4. The centripetal acceleration is also known as:

tangential acceleration radial acceleration linear acceleration angular acceleration
Q5. The uncertainty principle in wave mechanics states that it's impossible to simultaneously know with perfect accuracy both:

Energy and frequency Wavelength and velocity Position and momentum Amplitude and period
Q6. When a system is in thermal equilibrium, which of the following is true about its macroscopic properties?

All macroscopic properties are changing rapidly. Macroscopic properties such as temperature and pressure are constant over time. Macroscopic properties are fluctuating randomly but their average values are constant. Only temperature is constant; pressure and volume can still change.
Q7. Which force is responsible for radioactive decay?

Strong Nuclear Force Electromagnetic Force Weak Nuclear Force Gravitational Force
Q8. The Chandrasekhar limit is the maximum mass a star can have to support itself as a:

Neutron star Black hole White dwarf Red supergiant
Q9. What is the primary goal of magnetic confinement fusion (MCF)?

To physically contain a plasma using magnetic fields To fission heavy nuclei using magnetic fields To heat a plasma using lasers To convert gamma rays into usable energy
Q10. What is the total angular momentum quantum number J for a p-electron (l=1) in a state with spin quantum number s=1/2?

1/2 only 3/2 only 1/2 and 3/2 1/2, 1, 3/2
Q11. Which conservation law is violated in some weak interactions?

Conservation of energy Conservation of momentum Conservation of parity Conservation of charge
Q12. The breakdown voltage of a capacitor depends on the:

Area of the plates Distance between the plates Type of dielectric material Capacitance value
Q13. A glass beaker containing mercury is heated. Which will expand more?

Glass beaker Mercury Both expand equally Cannot be determined without coefficients
Q14. Which of the following statements is FALSE according to the Second Law of Thermodynamics?

It is impossible to construct a device that operates in a cycle and produces no effect other than the extraction of heat from a single reservoir and the performance of an equivalent amount of work. Heat cannot spontaneously flow from a colder body to a hotter body. The total entropy of an isolated system can only increase or remain constant. In any thermodynamic process, the total energy of the universe remains constant.
Q15. For a crystal with an even number of electrons per molecule, the magnetic susceptibility at low temperatures is generally:

Positive and large Negative and small Zero Positive and small
Q16. The momentum thickness of a boundary layer is defined as:

Integral of (1 - u/U) dy from 0 to δ Integral of (u/U)(1 - u/U) dy from 0 to δ Integral of (1 - u²/U²) dy from 0 to δ Integral of u/U dy from 0 to δ
Q17. If you cut a bar magnet in half, you will get:

One North pole and one South pole Two North poles and two South poles Two smaller magnets, each with a North and South pole No poles
Q18. What is the significance of the 'decay constant' (λ) in nuclear reactions, and how does it relate to the half-life (T½)?

λ is the number of decays per unit time; T½ = λ. λ is inversely proportional to the probability of decay; T½ = ln(2)/λ. λ is the rate of increase in radioactive nuclei; T½ = 1/λ. λ is the energy released per decay; T½ = 2λ.
Q19. What is the primary constituent of the nucleus of an atom?

Electrons and protons Protons and neutrons Neutrons and electrons Only protons
Q20. Which of the following is a fundamental postulate of statistical mechanics?

All accessible microstates are equally probable. Only low energy microstates are probable. Only high energy microstates are probable. Microstates change deterministically.

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