QUIZ START
Results
-
#1. In an RLC series a,c circuit power is dissipated in
#2. The unit of impulse of a force is
#3. Which of the following are not complimentary variables
#4. The count rate of radioactive substances diminishes from 600 to 150 in 60 secs. Determine the half life of the substance
#5. An ammeter connected to an a.c circuit records 5.5A. What is the peak value of the current?
#6. The following are components parts of a rocket except
#7. A radioactive substance half life of 20hrs. what fraction of the original radioactive nuclide will remain after 80hrs
#8. In a series L-C circuit, the inductance and the capacitance are 0.5H and 20µF respectively. Calculate the resonance frequency of the circuit
#9. Which of the following does not determine the electrical resistance of a wire
#10. Which of the following scientists proposed the uncertainty principle?
#11. The phenomemon of radioactivity was first discovered by
#12. When a metal is heated to a high temperature and electrons are emitted from its surface, this is known as ____
#13. Which of the following radiation is of nuclear origin
#14. The time rate of change of momentum is
#15. In an ac circuit the peak value of the potential difference is 180V. what is the instantaneous potential differences when the phase angle is 45o.
#16. The function of the fins in a rocket is to
#17. One of the following is a component of a satellite
#18. Which of the following instrument is most accurate for comparing e. m. f of two cells
#19. In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom, when the electron changes energy level?
#20. The uncertainty in the measurement of two complementary variables is ____ h/2π
#21. Calculate the peak voltage of a mains supply of r.m.s value of 220V.
#22. A material of mass 1.0X10-3kg undergoes fission process which decreases its mass by 0.02%. calculate the amount energy released in the process [c=3X108m/s]
#23. Most satellite depend on ….. for the generation of their electrical energy supply
#24. Which of the following contributed to conduction in a gas? (i) molecules (ii) electrons (iii) ions.
#25. The minimum energy required to liberate an electron from a metallic surface is
#26. . Which of the following is an application of hot cathode emission.
#27. The duality of matter implies that matter? (
#28. A 50Hz a.c circuit has a voltage of 220V and a current of 5.0A as its effective value. Determine the peak values of the voltage and its current.
#29. A substance has a half-life 30 mins after 6mins the count rate was observed to be 400. What was its count rate at zero time.
#30. A voltage supply of 12V r.m.s and frequency of 90Hz is connected to a 4Ω resistor. Calculate the peak value of the current .
#31. Which of the following is not an electromagnetic radiation
#32. Which of the following names is not associated with the models of the atom.
#33. When an atom is in ground state, it is said to be
#34. When compared, the r.m.s value is .......... the peak value.
#35. Which of the following give rise to the line spectra observed in atoms?
#36. In a nuclear reaction the mass defect is 2.0X10-6g. Calculate the energy released, given velocityof light is 3X108m/s.
#37. A nuclide 20284Y emits in succession an α-particle and β-particle. The atomic number of the resulting nuclide is
#38. The maximum kinetic of the photo electrons depend on
#39. Which of the following is called photo electric effect.
#40. A radioactive substance has a half-life of 3 days. If a mass of 1.55g of this substance is left after decaying for 15days,dertermine the original value of the mass
Finish
