NAVY FMT PHYSICS QUIZ 2
Results
PASSED
FAIL
#1. The SI unit of electric current is:
#2. The device used to measure electric current is:
#3. Resistance of a conductor is inversely proportional to its:
#4. In a parallel circuit, which quantity remains the same across all resistors?
#5. Commercial unit of electrical energy is:
#6. The magnetic field lines outside a bar magnet direct from:
#7. The unit of magnetic flux density is:
#8. Faraday’s Law of Electromagnetic Induction is related to:
#9. Lenz’s Law is a consequence of the law of conservation of:
#10. Transformer works on the principle of:
#11. A step-up transformer increases:
#12. The charge on an electron is:
#13. Alpha particles consist of:
#14. Beta particles are high energy:
#15. Gamma rays are:
#16. The SI unit of radioactivity is:
#17. Half-life of a radioactive substance depends upon:
#18. The nucleus of an atom consists of:
#19. Isotopes have the same number of:
#20. The binding energy per nucleon is maximum for:
#21. The energy of a photon is given by:
#22. Photoelectric effect was explained by:
#23. X-rays are electromagnetic waves of:
#24. In semiconductor, current flows due to:
#25. P-type semiconductor is obtained by doping silicon with:
#26. N-type semiconductor has majority charge carriers as:
#27. A PN junction diode conducts current when it is:
#28. Full-wave rectifier uses at least how many diodes?
#29. The particle discovered by Chadwick is:
#30. Work done in a closed path in a conservative field is:
FMT PHYSICS REVISION SERIES
Physics Quiz 3: Heat and Temperature
Learn how temperature is measured, how heat moves, and why materials expand when heated.
Explore Thermal Physics
Welcome to Pak Navy FMT Physics Quiz 3. This lesson covers heat, temperature, thermal expansion, heat transfer, and specific heat capacity. These concepts help explain everyday phenomena, from warming water to the expansion of railway tracks in hot weather.
Although heat and temperature are related, they do not mean the same thing. Temperature describes the thermal state of a substance, while heat is energy transferred because of a temperature difference.
Topics to Review
- Difference between heat and temperature
- Celsius and Kelvin scales
- Conduction, convection, and radiation
- Thermal expansion
- Specific heat capacity
Heat Versus Temperature
Temperature indicates how hot or cold something is and is related to the average microscopic kinetic energy of its particles. Its SI unit is the kelvin (K).
Heat is energy transferred from one body to another because of a temperature difference. It is measured in joules (J).
Heat
Energy transferred due to a temperature difference.
Temperature
A measure describing the thermal state of a substance.
Three Methods of Heat Transfer
1. Conduction
Heat transfer through a material without the material as a whole flowing from place to place. It is especially important in solids.
Example: A metal spoon becomes warm when one end is placed in hot water.
2. Convection
Heat transfer through the bulk movement of a fluid, such as a liquid or gas.
Example: Circulation in water as it heats in a pot.
3. Radiation
Energy transfer by electromagnetic waves. Radiation does not require a material medium.
Example: Energy from the Sun reaching Earth.
Thermal Expansion
Many substances expand when their temperature increases because the average separation between their particles changes. The amount of expansion depends on the material and the temperature change.
Expansion is considered when designing bridges, railway tracks, and other structures exposed to changing temperatures.
Specific Heat Capacity
Specific heat capacity is the energy required to raise the temperature of one kilogram of a substance by one kelvin, without a change of state.
Q = mcΔT
Q = heat energy, m = mass, c = specific heat capacity, and ΔT = temperature change.
Preparation Advice
Learn the difference between heat and temperature first. Next, practise identifying the three methods of heat transfer from everyday examples. For numerical questions, understand what each symbol in Q = mcΔT represents before substituting values.
Revision Checklist
- Remember the SI units of heat and temperature.
- Distinguish conduction, convection, and radiation.
- Understand thermal expansion.
- Review the specific heat capacity formula.
Educational notice: This article is independent study material and is not an official Pakistan Navy FMT examination paper.