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MCQs For Electricity 2
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MCQs For Electricity 2
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1. A fwire of length /, made of material resistivity ρ is cut into two equal pfarts. The resistivity of the two parts are equal to,
2. 1 mV is equal to:
3. 100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be:
4. If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then
5. The resistivity of insulators is of the order of
6. The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is
7. Which of the following gases are filled in electric bulbs?
8. Electric potential is a:
9. Electric power is inversely proportional to
10. 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?
11. 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
12. Two wires of same length and area, made of two materials of resistivity ρ1 and ρ2 are connected in parallel V to a source of potential. The equivalent resistivity for the same length and area is
MCQ Questions for Class 10 Science Electricity with Answers 4
13. In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be [NCERT Exemplar Problems]
14. The temperature of a conductor is increased. The graph best showing the variation of its resistance is
MCQ Questions for Class 10 Science Electricity with Answers 1
15. Calculate the current flows through the 10 Ω resistor in the following circuit.
MCQ Questions for Class 10 Science Electricity with Answers 5
16. When electric current is passed, electrons move from:
17. What is the commercial unit of electrical energy?
18. The resistivity does not change if [NCERT Exemplar Problems]
19. The resistance whose V-I graph is given below is
MCQ Questions for Class 10 Science Electricity with Answers 2
20. To get 2 Ω resistance using only 6 Ω resistors, the number of them required is
21. A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1 R2 and R3 respectively. Which of the following is hue? [NCERT Exemplar Problems]
MCQ Questions for Class 10 Science Electricity with Answers 9
22. The heating element of an electric iron is made up of:
23. Coulomb is the SI unit of:
24. What is the maximum resistance which can be made using five resistors each of 1/5 W? [NCERT Exemplar Problems]
25. The effective resistance between A and B is
MCQ Questions for Class 10 Science Electricity with Answers 7

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