1. A 60 W bulb is used for 10 hours. How much energy does it consume in kilowatt-hours (kWh)?
2. What is the formula for calculating the energy consumed by an electrical device?
3. A 12 V battery is connected to a resistor of 4 Ω. What is the current flowing through the circuit?
4. In a series circuit, the total current is:
5. In a parallel circuit, what is the total resistance?
6. In an electric circuit, what does the symbol "Ω" represent?
7. In an AC circuit, what is the phase difference between voltage and current in a purely inductive circuit?
8. What is the power factor in an AC circuit?
9. What is the formula for Ohm’s Law?
10. Which of the following is the correct application of the Superposition Theorem?
11. In a series circuit, if the voltage is 30 V and the total resistance is 10 Ω, what is the current in the circuit?
12. What is the total resistance in a series circuit?
13. What is the value of the resistance of a conductor at absolute zero temperature?
14. Which of the following materials is used as the core material in transformers?
15. A train 500 meters long is running at a speed of 36 km/h. How much time will it take to cross a platform 200 meters long?
16. What is the HCF of 24 and 36?
17. A man walks 6 km per hour, and a train is running at 36 km per hour. If the man walks in the same direction as the train, how much time will it take for the train to overtake him if the train is 150 meters long?
18. A person travels from A to B at a speed of 60 km/h and returns from B to A at a speed of 40 km/h. What is the average speed for the entire journey?
19. A boat goes 20 km downstream in 2 hours and comes back in 4 hours. What is the speed of the boat in still water?
20. If the HCF of two numbers is 8 and their LCM is 72, and one of the numbers is 24, find the other number.
21. The HCF of 36 and 60 is 12. What is their LCM?
22. If the LCM of two numbers is 120 and their HCF is 10, what is the product of the two numbers?
23. The LCM of two numbers is 180 and their HCF is 12. If one of the numbers is 36, find the other number.
24. A car travels 60 km in 1 hour and 30 minutes. What is its average speed in km/h?
25. A train travels 100 meters in 10 seconds. What is the speed of the train in km/h?
26. A mixture contains milk and water in the ratio 5:3. How much water must be added to 40 liters of this mixture to make the ratio 5:7?
27. A train 250 meters long is running at a speed of 90 km/h. How much time will it take to cross a man walking at 6 km/h in the same direction as the train?
28. The HCF of two numbers is 18 and their LCM is 252. If one of the numbers is 36, find the other number.
29. What is the LCM of 8 and 12?
30. What is the unit of electrical resistance?
