Lakhmir Singh - Class 10 Physics Chapter 1 all questions
Answers
"(a) Name a device that help to measure the potential difference across a co.....
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"Draw circuit symbols for (a) fixed resistance (b) variable resistance (c) a.....
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"(a) Why do electricians wear rubber hand gloves while working with electric.....
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"What would be the effect on the resistance of a metal wire of
(a) increasin.....
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"The resistivity of a certain material is 0.6 Ωm. The material is most likel.....
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"Which of the following arrangement, A or B, has the lower combined resistan.....
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"(a) With the help of a circuit diagram, deduce the equivalent resistance of.....
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"The figure given below shows three resistors?
Their combined resistance is .....
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"(a) Explain with the help of a labelled circuit diagram, how you will find .....
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"V1, V2 and V3 are the p.ds. across the 1Ω, 2Ω and 3Ω resistors in the follo.....
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"A battery and three lamps are connected as shown
Which of the following sta.....
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"In the circuit shown below
Ώ
The potential difference across the 3 Ω resist.....
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"You are given three resistances of 1, 2 and 3 ohms. Shows by diagrams, how .....
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"How will you connect three resistors of resistances 2 Ω, 3 Ω, and 6 Ω to ob.....
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"What is (a) highest, and (b) lowest, resistance which can be obtained by co.....
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"How will you connect three resistors of 2 Ω, 3 Ω and 5 Ω respectively so as.....
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"The resistors R1, R2, R3 and R4 in the figure given below are all equal in .....
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"You can given one hundred 1 Ω resistors. What is the smallest and largest r.....
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"Which type of circuit, series or parallel, is preferred while connecting a .....
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"Why is a series arrangement not used for connecting domestic electrical app.....
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"Consider the circuit given below
(i)
(ii) (iii)
(a) In which circuit are th.....
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"(a) Which is the better way to connect lights and other electrical applianc.....
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"Consider the circuit given below when A, B and C are three identical light .....
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"Using the circuit given below, state which of the following statement is co.....
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"(a) Draw a circuit diagram showing two lamps, one cell and a switch connect.....
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"If current flows through two lamps arranged
(a) in series,
(b) in parallel,.....
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"The figure blow shows a variable resistor in a dimmer switch.
How would you.....
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"Which one has a higher electrical resistance a 100 watt bulb or a 60 watt b.....
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"The table below shows the current in three different electrical appliances .....
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"State whether an electric heater will consume more electrical energy or les.....
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"An electric bulb is rated as 10 W, 220 V. How many of these bulbs can be co.....
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"(a) State and explain Joule's law of heating.
(b) A resistance of 40 ohms a.....
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"The heat produced in a wire of resistance 'x' when a current 'y' flows thro.....
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"Which of the following is the most likely temperature of the filament of an.....
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"In a filament type light bulb, most of the electric power consumed appears .....
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"The electrical resistivities of four materials P, Q, R and S are given belo.....
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"Which electric heating device in your home do you think have resistors whic.....
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