Physics Practice: Electricity (Mock Test 3 - Advanced)
1. When a glass rod is rubbed with silk, it acquires a positive charge because:
2. Three resistors of $2\ \Omega, 4\ \Omega,$ and $6\ \Omega$ are connected in series. The equivalent resistance is:
3. What happens to the total resistance of a circuit when more resistors are added in parallel?
4. Why is the "Neutral" wire in a domestic circuit grounded at the local substation?
5. A bulb is rated $100\text{ W, } 220\text{ V}$. What does this indicate?
6. Gold-leaf electroscope is a device used to:
7. The material used for making "Standard Resistors" (like Manganin) has a resistance that:
8. Which of the following is an example of the "Chemical Effect" of electric current?
9. If the current through a resistor is doubled, the heat produced in it becomes:
10. A fuse wire is always connected in the ________ wire.
11. Electrolysis is the process of decomposing a liquid compound by passing ________ through it.
12. In the "Lighting Conductor," the pointed ends are used to:
13. The potential of the Earth is considered to be:
14. When an atom loses an electron, it becomes a ________ ion.
15. The electrode connected to the positive terminal of a battery during electrolysis is the:
16. Why is it dangerous to touch a switch with wet hands?
17. Static charges always reside on the ________ of a conductor.
18. An electric heater of $1000\text{ W}$ is used for $2\text{ hours}$. The energy consumed is ________ units ($kWh$).
19. Which law states that the current flowing through a conductor is directly proportional to the potential difference across its ends?
20. The device used to increase or decrease the voltage in an AC circuit is a:
