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- A wire of length 3 m and area of cross-section 1.7 × 10-6m2has a resistance 3 × 10-2ohm. a. What is the formula for resistivity of the wire and what is the unit of it.
- The table given below shows the resistivity of three Material X, Y and Z? a. Arrange the samples in increasing order of conductivity. b. Which of these is best conductor?
- There are m resistor each of resistance R. First they all are connected in series and equivalent resistance is X. Now they are connected in parallel and equivalent resistance is Y. What is the ratio of X and Y?
- We have four resistors A ,B ,C and D of resistance 4 ohm,8 ohm ,12 ohm and 24 ohm respectively? (i)Lowest resistance which can be obtained by combining these four resistors.
Jul 20, 2022 · We have given these Important Questions for Class 10 Science Chapter 12 Electricity to solve different types of questions in the exam. Previous Year Questions & Important Questions of Electricity Class 10 Science Chapter 12 will help the students to score good marks in the board examination.
- The wire used in the element of electric heater has a high resistivity and have a high melting point, i.e. even at a high temperature element do no...
- In series, same current flows through each resistor. So, ratio of current is 1 : 1.
- The wire used in the element of electric heater has a high resistivity and have a high melting point, i.e. even at a high temperature element do no...
Learn Physics concepts and practice questions of Electricity Class 10 from NCERT book and Teachoo website. Find solutions, notes, examples, MCQs, past year papers and more for Chapter 12 of Science.
May 28, 2023 · Solve 10 numerical problems on electricity chapter for class 10 with formulas and solutions. Learn about current, charge, potential difference, work done, resistance, and more.
- Overview
- Electric current and circuit
- Electric potential and potential difference
- Circuit diagram
- Ohm's law
- Factor on which the resistance of a conductor depends
- Resistance of system of resistors
- Heating effect of electric current
- Electric power
- GeneratedCaptionsTabForHeroSec
Prepare for class 10 CBSE exam using this analysis of the last 10 years’ question papers from the chapter Electricity. Explore common and important questions, with solutions.
Let's explore some of the main types of problems that appeared in the last ten years of CBSE board exams, arranged by subtopic.
Type A. Definitions
Frequency of appearance: ★★★★★
Q1. What is an electric circuit? Distinguish between an open and a closed circuit.
[2 marks, AI 2009 ]
•[Solution]
Type B. Applying the definitions of Coulomb and current
Type C. Relation between potential difference and work
Frequency of appearance: ★★★★★
Q3. (a ) Define the term 'volt'.
(b ) State the relation between work, charge and potential difference for an electric circuit.
Calculate the potential difference between the two terminals of a battery if 100 J of work is required to transfer 20 C of charge from one terminal of the battery to the other.
[3 marks, AI 2009 ]
Type D. Drawing circuit elements and circuits
Frequency of appearance: ★★★★★
Q4. Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V , 5 Ω , 10 Ω and 15 Ω resistors and a plug key, all connected in series.
[1 mark, AI 2009 ]
•[Solution]
Q5. Draw the symbols of commonly used components in electric circuit diagrams for
Type E. V -I graph and applying Ohm's law
Frequency of appearance: ★★★★★
Q6. State Ohm's law. Draw a labelled circuit diagram to verify this law in the laboratory. If you draw a graph between the potential difference and current flowing through a metallic conductor, what kind of curve will you get? Explain how you would use this graph to determine the resistance of the conductor.
[5 marks, Board Term I, 2016 ]
•[Solution]
Feeling stuck?
Type F. Word problems and numericals
Frequency of appearance: ★★★★★
Q7. (a ) List the factors on which the resistance of a conductor in the shape of a wire depends.
(b ) Why are metals good conductors of electricity while glass is a bad conductor of electricity? Give reasons.
(c ) Why are alloys commonly used in electrical heating devices? Give reason.
[3 marks, 2018 (AI, Delhi, Foreign)]
Type G. Calculating equivalent resistance and currents
Frequency of appearance: ★★★★★
Q10. Two resistors, of resistances 5 Ω and 10 Ω respectively are to be connected to a battery of e.m.f. 6 V so as to obtain
(i ) minimum current flowing
(ii ) maximum current flowing.
(a )How will you connect the resistances in each case?
Type I. Relation between heat produced in a wire and resistance
Frequency of appearance: ★★★★★
Q13. A fuse wire melts at 5 A . If it is desired that the fuse wire of the same material melt at 10 A , then should the new fuse wire be of smaller or larger radius than the earlier one? Give reasons for your answer.
[3 marks, Board Term I, 2014 ]
•[Solution 1 (in words)]
•[Solution 2 (calculation)]
Type K. Calculating power and energy consumed
Frequency of appearance: ★★★★★
Q15. Two lamps, one rated 100 W; 220 V , and the other 60 W; 220 V , are connected in parallel to electric mains supply. Find the current drawn by the two lamps from the line, if the supply voltage is 220 V .
[2 marks, Board Term I, 2014 ]
•[Solution]
Q16. (a ) How should two resistors, with resistances R1 Ω and R2 Ω be connected to a battery of e.m.f. V volts so that the electrical power consumed is minimum?
Practice for class 10 CBSE exam with problems from the chapter Electricity, based on the last 10 years' question papers. Find common and important questions, with solutions, on topics such as electric current, potential difference, circuit diagram, Ohm's law and more.
Prepare for class 10 CBSE exam for the chapter Electricity by revising difficult board-type numerical questions. Created by Mahesh Shenoy.
- 34 min
- Mahesh Shenoy
Sep 27, 2019 · Electricity class 10 NCERT solutions will not only help in board exam preparation but also helps in clearing the competitive exams like Engineering. Also, candidates can find electricity class 10 numericals with solutions which helps candidates solving their assignments. Read on to find out everything NCERT Solutions For Class 10 Science ...
