PHY101 Quiz 3 by VU Stars

Phy101 Quiz 3 Quiz by VU Stars

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1. Lenz’s law is in accordance with law of conservation of

Q2. Which of the following types of electromagnetic radiation at the greatest speed in vacuum?

All of these travels at the same speed….confirm

3. Inductive reactance XL of an inductor is

2(pi)fL…. confirm

4. Force per unit charge is:

Electric field intensity…confirm

5. The sum of electric and magnetic force is called Lorentz force…confirm
6. Radio waves and light waves are ______. Electromagnetic and transverse both…confirm
7. Kirchhoff’s 1st rule is the manifestation of the law of conservation of
8. Kirchhoff’s 2nd rule is the manifestation of the law of conservation of
9. The total energy in an circuit is 5.0 * 10-6 J. if L=25mH the maximum current is: 20mA…confirm
10. If Io is the peak value of an AC supply, then its rms value is given as firms Io/square root2….confirm
11. The potential difference between the ends of a conductor is 12V. How much electrical energy is converted to other forms of energy in the conductor when 100C of charge flows through it? 1200J….confirm
12. A particle carrying a charge of 2e falls through potential difference of 3V the energy acquired by it will be: 6 eV…confirm
13. An inductor may store energy in its: Magnetic field…confirm
14. The graphical representation of Ohm’s law is: Straight line…confirm
15. Radio waves and light waves are _______. Longitudinal waves…confirm
16. The increase in capacitance of a capacitor due to presence of dielectric is due to: Electric polarization
17. The Focal length of convex lens is: Positive…confirm
18. The AC circuit in which current and voltage are in phase the power factor is 1…confirm
19. The wavelength of red light is 700 nm. Its frequency is ______.
20. 29*10^14 hertz…confirm
21. The known laws of electromagnetism before James Clerk Maxwell were following EXCEPT Faraday’s Law…confirm
22. When some dielectric is inserted between the plates of a capacitor, then capacitance; Increased…..confirm

Q21. Which of the following is NOT the characteristics of electromagnetic waves?

They can travel with different speeds in vacuum depending on frequency…..confirm

22. If electric and gravitational force on an electron in uniform electric field balance each other, then the intensity of electric field will be: Mg/q
23. The increase in capacitance of a
24. Electric energy is measured WaTT…confirm
25. When we accelerate the charge, which types of waves are produced Electromagnetic waves….confirm
26. A particle device transmitted a signal in the form of electromagnetic waves of frequency 7.5 * 108Hz. What is the wavelength of the signal.
27. 4m
28. A step-down transformer is used to: Decrease the voltage
29. The quantity of deltaV/deltar is called Potential gradient

Q28. Which electromagnetic radiation transmits the highest photon energy?

Gamma rays….confirm

29. The reaction of an particle at 50 Hz is 10.0 its reactance at 100Hz becomes
30. 0
31. Work done on a charged particle moving in uniform magnetic field is
32. Select the correct statement Gamma Rays have higher frequency than infrared waves…confirm
33. Which of the following have the greatest wavelength Radio waves
34. Potentiometer can be used as Potential divider….confirm
35. All of the followings are the different types of mental images; people generally experience them while close their eyes Except: Solving an algebra equations
36. The nation that motivational state of the organism is understood and explained in terms of positive and negative environmental stimuli BEST connects to; Incentive approaches
37. If one wants to increase the capacity of short-term memory, through which process more items can be held? Chunking….confirm
38. Which physical quantity is produced by a calculation where a charge is
39. The current in a car headlamp is 2.0 A. The Headlamp is switched an for 3.0 360 C
40. If potential difference across two plates of a capacitor is doubled, then Four times….comfirm
41. How could the unit of potential difference the volt also be written? J/C
42. If magnetic field is doubled then magnetic energy density becomes Four times….confirm
43. The primary of a 3.1 step-up transformer is connected to a source and the secondary this situation is P. If R is connected directly to the source it will dissipate a power of: P/9….confirm
44. A particle having 2e charge falls through a potential difference of 5.V energy acquired by it is 10 eV
45. A generator supplies 100V to the primary call of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is 1000V
46. The combined effect of resistance and reactance is known as Impedance…confirm