16. Which of the following conducting wires has the least resistance?
A. Steel Wire at room temperature
B. Steel Wire at higher temperature
C. Copper wire at room temperature
D. Copper wire at higher temperature constant, when resistance remains
constant
17. Which of the following is correct, when the resistances of 1.0 2, 2.0 Q and
3.0 22 are connected in parallel circuit?
A. The total resistance is less than 1.0 22.
B. The total resistance is greater than 1.0 22
C. The total resistance is greater than 2.0 2.
D. The total resistance is greater than 3.0 2.
18. Which of the following is connected in series with the load at home?
A. TV
B. switch
C. light bulbs
D. refrigerator
For question nos. 19 to 22, the choices are as follows:
A. advantage of series circuit C. disadvantage of series circuit
B. advantage of parallel circuit D. disadvantage of parallel circuit
19. The circuit does not overheat easily.
20. Adding more loads may cause overloading in the circuit.
21. If one bulb is damaged in the circuit, other bulbs will still function.
22. If one bulb is damaged in the circuit, all other bulbs will not function too.
23. Which electrical device shuts down when there is overloading in the circuit?
A. fuse B. voltage source C. circuit breaker D. electrical switch
24. Which electrical device blows up when there is overloading in the circuit?
A. fuse B. switch
C. resistor D. circuit breaker
25. Why is earthing need at home?
A. To prevent short circuit.
B. To cut the circuit in case of overloading.
C. To reduce the resistance of the appliance.
D. To provide alternative route of upsurge current in case of grounded​