MCQ Questions for Class 10 Science Chapter 12 Electricity with Answers
.jpeg)
1. Two resistors are connected in series gives an equivalent resistance of 10 Ω. When connected in parallel, gives 2.4 Ω. Then the individual resistance are
2. If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then
3. The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use?
4. The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is
5. A coil in the heater consume power P on passing current. If it is cut into halves and joined in parallel, it will consume power
6. A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of
7. A cooler of 1500 W, 200 volt and a fan of 500 W, 200 volt are to be used from a household supply. The rating of fuse to be used is
8. The effective resistance between A and B is
9. A cell, a resistor, a key, and an ammeter are arranged as shown in the circuit diagrams. The current recorded in the ammeter will be [NCERT Exemplar Problems]
10. A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly [NCERT Exemplar Problems]
11. What is the maximum resistance which can be made using five resistors each of 1/5 W? [NCERT Exemplar Problems]
12. Unit of electric power may also be expressed as
13. Electrical resistivity of a given metallic wire depends upon
14. A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure (i), (ii) and (iii). The current recorded in the ammeter will be
15. The unit of e.m.f. of a cell is
16. Kilowatt hour is the unit of
17. 1 kWh is equal to
18. Materials which allow larger currents to flow through them are called
19. Conventionally, the direction of the current is taken as
20. The unit of specific resistance is
21. The slope of voltage (V) versus current (I) is called
22. The variable resistance is called
23. The SI unit of resistance is
24. An electric iron draws a current 4 A when connected to a 220 V mains. Its resistance must be
25. The element used almost exclusively for filaments of incandescent lamps
26. A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to,
27. A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is
28. A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is
29. To get 2 Ω resistance using only 6 Ω resistors, the number of them required is
30. Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is
31. The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is
😊😊😊
If you have any doubts, Please let me know