Physics Practice: Current Electricity (Mock Test 5 - Ultimate Mastery)
1. The amount of work done in moving a charge of $2\text{ C}$ across two points having a potential difference of $12\text{ V}$ is ________.
2. When resistors are connected in series, the ________ through each resistor is the same.
3. A wire of resistance $10\text{ }\Omega$ is bent to form a circle. The resistance between two diametrically opposite points is ________.
4. Which of the following does NOT represent electrical power ($P$)?
5. The potential difference across the terminals of a cell in a closed circuit is $V$, and its e.m.f. is $E$. Then ________.
6. If three resistors of $3\text{ }\Omega$ each are connected in parallel, the total resistance is ________.
7. The resistance of a conductor is independent of ________.
8. A dry cell of e.m.f. $1.5\text{ V}$ and internal resistance $0.5\text{ }\Omega$ is short-circuited. The current will be ________.
9. The material used for the heating element of an electric iron is ________.
10. Conductance is the reciprocal of ________.
11. A fuse is always connected in ________ with the ________ wire.
12. The commercial unit of electrical energy is kilowatt-hour (kWh). $1\text{ kWh}$ is also called ________.
13. To measure the potential difference across a resistor, a voltmeter must have ________ resistance.
14. When two resistors $R_1$ and $R_2$ are in parallel, their equivalent resistance $R_p$ is ________.
15. An electric bulb is rated $100\text{ W}$, $250\text{ V}$. The resistance of the filament is ________.
16. The charge on an electron is approximately ________.
17. Ohmic conductors follow Ohm's Law provided their ________ remains constant.
18. A lead-acid accumulator is an example of a ________ cell.
19. The resistivity of a wire ________ if it is stretched to three times its length.
20. Which principle states that the total current entering a junction equals the total current leaving it?