Physics GK 20 - Electricity

1234567891011121314151617181920
1).
Which of the following is the commercial unit of electric power?
2).
What is the work done to move a unit charge from point to another called as?
3).
As per Ohm's law, if the resistance of a conductor is doubled, what will be the effect on the current flowing through it?
4).
Which of the following metals is mostly used for filaments of electric bulbs?
5).
What is the property of a conductor to resist the flow of charges known as?
6).
What of the following represents Ohm's law (V= potential difference and I=current)?
7).
Which of the following is true about metals?
8).
Which of the following is an example of insulator?
9).
Which of the following is true about the force between two point charges as per the Coulomb's law?
10).
What is the value of permittivity of free space?
11).
What is the total charge of the electric dipole?
12).
What do we call the rate at which electric energy is dissipated or consumed in an electric circuit?
13).
What is current density?
14).
What do we call the magnitude of the drift velocity per unit electric field?
15).
What number does orange colour represent in the resistance colour code?
16).
Which of the following represents Electric Power (V=Voltage, I=Current)?
17).
What is the S.I. unit of electric charge?
18).
Which of the following represents the unit ampere?
19).
How many electrons constitutes a 1 coulomb charge?
20).
On which of the following does the resistance of a conductor depend?
1. Which of the following is the commercial unit of electric power?
[A] Joule
[B] KWh
[C] Watt
[D] Ampere
2. What is the work done to move a unit charge from point to another called as?
[A] Current
[B] Resistance
[C] Conductance
[D] Potential Difference
3. As per Ohm’s law, if the resistance of a conductor is doubled, what will be the effect on the current flowing through it?
[A] it gets doubled
[B] it gets halved
[C] it increases 4 times
[D] No change
4. Which of the following metals is mostly used for filaments of electric bulbs?
[A] Copper
[B] Silver
[C] Nickel
[D] Tungsten
5. What is the property of a conductor to resist the flow of charges known as?
[A] Conductance
[B] Conductivity
[C] Resistance
[D] Electric Potential
6. What of the following represents Ohm’s law (V= potential difference and I=current)?
[A] V = I 2
[B] V = 1/I
[C] V/I = constant
[D] None of the above
7. Which of the following is true about metals?
[A] They are good conductors of electricity
[B] They have low resistivity
[C] Both a and b
[D] None of the above
8. Which of the following is an example of insulator?
[A] Diamond
[B] Mercury
[C] Iron
[D] Chromium
9. Which of the following is true about the force between two point charges as per the Coulomb’s law?
[A] inversely as the square of the distance between the charges
[B] directly proportional to the product of the magnitude of the two charges
[C] Both a and b
[D] None of the above
10. What is the value of permittivity of free space?
[A] 8.854 × 10–10 C2 N–1 m–2
[B] 8.854 × 10–11 C2 N–1 m–2
[C] 8.854 × 10–12 C2 N–1 m–2
[D] 8.854 × 10–13 C2 N–1 m–2
Advertisement

Kindly help us to keep GKToday updated and error free. Use this form to report error or outdated information in questions. We shall rectify asap...