PHY101 Updated Quiz 3 2022

PHY101 Quiz 3 2022 · LECTURE 23 to 30 · 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 travel 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 ______.

4.29*10^14 hertz…confirm

21. The known laws of electromagnetism before James Clerk Maxwell were following EXCEPT

Faraday’s Law…confirm

20. When some dielectric is inserted between the plates of a capacitor, then capacitance; Increased…..confirm
21. 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.

0.4m · 27. A step-down transformer is used to: · Decrease the voltage · 27. The quantity of deltaV/deltar is called · Potential gradient