Test-MCQ Class 10-NCERT -Science-Chapter 12-Test-2 Chapter 12: Electricity Multiple Choice Questions No of Questions : 15 Marks: 15 Please enter your email: 1. To determine the eguivalent resistance of two resistors connected in series, a student prepared two electric circuits, correct reading of ammeter in the circuits is In circuit I, 1.0 A and in II, 0.1 A In circuit I, 0.1 A and in II, 1.0 A In both circuits I and II, 0.1 A In both circuits I and II, 1.0 A 2. When parallel resistors are of three different values, the potential difference across its terminals is greatest across smallest resistance greatest across largest resistance equal across each resistance least across the smallest resistance 3. A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure12.1. The current recorded in the ammeter will be the same in all the cases maximum in (i) maximum in (ii) maximum in (iii) 4. In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be minimum in case (ii) minimum in case (iii) minimum in case (i) same in all the cases 5. Electrical resistivity of a given metallic wire depends upon its thickness nature of the material its shape its length 6. 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 1023 1020 1018 1016 7. Identify the circuit in which the electrical components have been properly connected. (ii) (i) (iv) (iii) 8. What is the maximum resistance which can be made using five resistors each of 1/5 Ω? 1 Ω 1/5 Ω 10 Ω 5 Ω 9. What is the minimum resistance which can be made using five resistors each of 1/5 Ω? 1/10 Ω 25 Ω 1/25 Ω 1/5 Ω 10. The proper representation of series combination of cells obtaining maximum potential is (i) (iv) (ii) (iii) 11. Which of the following represents voltage? b a d c 12. A cylindrical conductor of length l and uniform area of crosssection A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section. 2A A/2 3A/2 3A 13. 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 true? R2/sub> > R3 > R1 R1 = R2 = R3 R1 > R2 > R3 R3 > R2 > R1 14. If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be 200 % 300 % 100 % 400 % 15. In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness? Brightness of all the bulbs will be the same Brightness of bulb B will be more than that of A Brightness of bulb A will be the maximum Brightness of bulb C will be less than that of B Please Enter Your Name, School Name & Class in the given below box and submit: ( results will be shown on this page within few moments after submit ) Loading … Question 1 of 16
