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Class 10 maths NCERT solutions And Study material Apr 01, �� Circles ML Aggarwal Solutions ICSE Class Maths Chapter We Provide Step by Step Answer of Exercise, Exercise, Exercise Circles, with MCQs and Chapter-Test Questions / Problems related for ICSE Class APC Understanding Mathematics. Visit official Website CISCE for detail information about ICSE Board Class What is the Hybridization of Methane? When we talk about CH4 it is basically a combination of 1 carbon and 4 hydrogen atoms. However, to form this compound the central atom carbon which has 4 valence electrons obtain more electrons from 4 hydrogen atoms to complete its octet. NCERT Solutions for Class 10 Maths. NCERT Solutions for Class 10 Maths Chapter 1; Access Lakhmir Singh Solutions For Class 10 Chemistry Chapter 2. A blanket of carbon dioxide comes out with the liquid and cut the supply of air to the burning substance. When the supply of air gone the fire gets extinguished.
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It melts when a sudden urge of large current passes through it and disconnects the entire circuit from the electrical supply. But, in case if we use a larger rating instead of a defined rating, then it will not protect the circuit as high current will easily pass through it and it will not melt.

The wattage of a bulb is 24 W when it is connected to a 12 V battery. Calculate its effective wattage if it operates on a 6 V battery Neglect the change in resistance due to unequal heating of the filament in the two cases.

Consider the following circuit diagram. A torch bulb is rated 2. Calculate i its power, ii its resistance and iii the energy consumed, if this bulb is lighted for four hours. Series arrangements are not used for domestic circuits.

List any three reasons. Series arrangements are not used for domestic circuit because. Name the physical quantity which is i same ii different in all the bulbs when three bulbs of: a same wattage are connected in series.

Two devices of rating 44 W, V and 11 W, V are connected in series. The combination is connected across a V mains. The fuse of which of the two devices is likely to burn when the switch is ON? Five resistors are connected in a circuit as shown. Find the ammeter reading when circuit is closed. Study the circuit shown in which three identical bulbs B 1 , B 2 and B 3 are connected in parallel with a battery of 4. Resistance of. A circuit is shown in the diagram given below.

Consider the circuit shown in the diagram. So, A is the longest. So, in the given I-V graph, slope of series combination would be less than that of A. So, in the given I-V graph, slope for parallel combination is more than that of D. In an experiment to study the relation between the potential difference across a resistor and the current through it, a student recorded the following observations: On examine the above observations, the teacher asked the student to reject one set of readings as the values were out of agreement with the rest.

Which one of the above sets of readings can be rejected? Calculate the mean value of resistance of the resistor based on the remaining four sets of readings. Explain with the help of a labelled circuit diagram, how will you find the resistance of a combination of three resistors, of resistance R 1 , R 2 and R 3 joined in parallel.

Also mention how will you connect the ammeter and the voltmeter in the circuit while measuring the current in the circuit and the potential difference across one of the three resistors of the combination. Parallel Combination:. To find the current flow through any one of the resistor, ammeter will be connected in series with that resistor and to measure the potential difference across that resistor, voltmeter must be connected in parallel with that resistor as shown.

With which name is the relation known? How much heat will an instrument of 12 W produce in one minute if it is connected to a battery of 12 V? Let V be the potential difference applied by cell across the ends of a wire. Let W be the work done in carrying the charge q across the conductor, then. Deduce the expression for the equivalent resistance of the parallel combination of three resistors R 1 , R 2 and R 3 Consider the following electric circuit: a Which two resistors are connected in series?

Consider the following parallel circuit shown below: Let I 1 , I 2 and I 3 be the current flow through the resistor R 1 , R 2 and R 3 connected in parallel.

How can the values of current passing through them be compared? In series, same current flows through each resistor. So, ratio of current is 1 : 1. What is the resistance across a diagonal of the square?

Calculate the resistance of the wire in the new Situation. What is an electric circuit? Distinguish between an open and a closed circuit. An arrangement for maintaining the continuous flow of electric current by the electrical energy source through the various electrical components connected with each other by conducting wires is termed as electric circuit.

An open circuit does not carry any current, while a closed circuit carries current. So, to get maximum current, the equivalent resistance has to be less. This means the resistors must be connected in parallel. To get minimum current, the equivalent resistance has to be greater as. Calculate the potential difference between the two terminals of a battery if J of work is required to transfer 20 C of charge from one terminal of the battery to the other. Calculate the charge passing through an electric bulb in 20 minutes if the value of current is mA.

In which combination, will the potential difference acrossR 1 and across R 2 be the same and in which combination, will the current through R 1 and through R 2 be the same? One ampere of current is that current which flow when one coulomb of electric charge flowing through a particular area of cross-section of the conductor in one second, i. The direction of conventional current is A to B, i.

In a metal, flow of electrons carrying negative charge constitutes the current. Direction of flow of electrons gives the direction of electronic current by convention, the direction of flow of positive charge is taken as the direction of conventional current.

Procedure : Connect the cell, an ammeter and plug key in series with nichrome wire of length T marked 1 in the gap XY as shown. Close the key and note the reading of ammeter. Note the ammeter reading I 2 again after closing the key. Again replace the marked 2 wire with marked 3 wire which has the same length but is thicker than marked 1 and 2 nichrome wires.

Again note down the current I 3 through this wire. Unplug the key. Remove marked 3 nichrome wire from the gap XY. Connect the copper wire marked 4 having same length and same area of cross-section as that of nichrome wire marked 1. Plug the key again and note the ammeter reading. It measures the current I 4 through copper wire.

Repeat the experiment with iron wire and measure the current I 5. Current I 4 and I 5 is different for copper and iron wire. Conclusion : Different wires drew different amount of current from the same cell. First observation indicates that the resistance of the conductor increases with increase in length. So, resistance Ncert Solutions Class 10th Maths Chapter 5 Date is directly proportional to length.

Second observation shows that thicker wires have lesser resistance. Write the structure of an isomer of compound C 4 H 9 Br which is most reactive towards S N 1 reaction. Write the structure of l-Bromochlorobutene. Write the structure of 2, 4-dinitrochlorobenzene. Out of which is an example of allylic halide? Out of which is an example of vinylic halide? Out of which is an example of a benzylic halide? Which one in the following pairs of substances undergoes S N 2 substitution reaction faster and why?

Which one in the following pairs undergoes S N 1 substitution reaction faster and why? Complete the following reaction equations : All India Answer:. How are the following conversions carried out? Delhi Answer: i Benzyl chloride to benzyl alcohol ii Methyl magnesium bromide to 2-methylpropanol.

Haloalkanes undergo nucleophilic substitution whereas haloarenes undergo electrophilic substitution. Delhi Answer: Haloarenes say chlorobenzene is a resonance hybrid of the following five structures : Resonance leads to lowering of Ncert Solutions Class 10 Maths Ch 6 Ex 6.2 Note energy and hence greater stability. On the other hand, no such resonance is possible in haloalkanes. Halogens directly attached to benzene ring are o, p-directing in electrophilic subsitution reactions.

This is due to greater electron density at these positions in resonance. Chlorobenzene is extremely less reactive towards a nucleophilic substitution reaction. Give two reasons for the same. As a result, the C � Cl bond in chlorobenzene is shorter and hence stronger. Thus, cleavage of C � Cl bond in benzene becomes difficult which makes it less reactive towards nucleophilic substition.

Delhi Answer: a p-isomers are comparetively more symmetrical and fit closely in the crystal lattice, thus require more heat to break these strong forces of attraction. Therefore higher melting point than o- and m-isomers. Delhi Answer: i In haloalkanes, the halogen atom is attached to sp 3 -hybridized carbon while in haloarenes it is attached to sp 2 -hybridized carbon whose size is smaller than sp 3 orbital carbon. Therefore C � Cl bond in chloro-benzene is shorter than alkyl chloride.

Give chemical tests to distinguish between the following pairs of compounds : a Benzyl chloride and Chlorobenzene b Chloroform and Carbon tetrachloride Comptt. Delhi Answer: a Chlorobenzene and Benzyl chloride : Benzyl chloride is more reactive than chlorobenzene towards nucleophillic substitution reactions, therefore, benzyl chloride on boiling with aqueous KOH produces benzyl alcohol and KCl. The reaction mixture on acidification with dil.

Explain why : a The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride. All India Answer: a Chlorobenzene has lower dipole moment than cyclohexyl chloride due to lower magnitude of -ve charge on the Cl atom and shorter C � Cl distance.

Due to greater S-character, a sp 2 -hybrid carbon is more electronegative than a sp3-hybrid carbon. Therefore, the sp 2 -hybrid carbon of C � Cl bond in chlorobenzene Byjus Class 7 Maths Icse Solutions Error has less tendency to release electrons to Cl than a sp 3 hybrid carbon of cyclohexyl chloride. The molecules of H 2 O are held together by H- bonds. Since the new forces of attraction between water and alkyl halide molecules are weaker than the forces of attraction already existing between alkyl halide-alkyl halide molecules and water-water molecules, therefore alkyl halides are immiscible not soluble with water.

Draw the structure of major monohalo product in each of the following reactions : Delhi Answer:. What are ambident nucleophiles? Explain with an example. All India Answer: Ambident nucleophile : A nucleophile that can form new bonds at two or more spots in its structure, usually due to resonance contributors. Write the structures of the following organic halogen compounds : i 4-tert-Butyliodoheptane ii 4-Bromomethylpentene Comptt.

All India Answer: i 4-tert-Butyliodoheptane. Write the structures of the following organic halogen compounds : i p-Bromochlorobenzene ii 1-Chloroethylcyclohexane Comptt. All India Answer: i p-Bromochlorobenzene.

Write the equations for the preparation of 1-bromobutane from : i 1-butanol ii but-l-ene Comptt. All India Answer: i Preparation of 1-bromobutane from 1-butanol. Which compound in each of the following pairs will react faster in S N 2 reaction with �OH? Which alkyl halide from the following pair is i Chiral and ii undergoes S N 2 reaction faster? Which alkyl halide from the following pair is i Chiral and ii undergoes S N 1 reaction faster?

You will learn here how to disintegrate an equation into parts and find the integral of each of the parts. This is known as partial fraction decomposition. This part would teach you methods on how to integrate products of functions.

This method is also called partial integration. You would then learn how to apply integration on both sides and conclude that integral of the product of 2 functions is given by:. In this section, you will closely learn about what a definite integral is. In this, a is the lower limit and b is the upper limit of the integral. You would also learn how to represent a definite integral either as a limit of a sum or an antiderivative in the interval [a, b].

In this chapter, you would learn how concepts of integration and differentiation of a function are linked. This is done by calculating the anti-derivative difference at the upper and lower limits of the integration process.

F � antiderivative of f. Now integrate the new integrand without mentioning the constant of integration. Here you will learn many properties of definite integral which will simplify the process of evaluating definite integrals. Some of the properties mentioned are as below:.

You will also learn how to prove all these properties in this section of Integrals Class 12 Notes Maths Chapter 7. Maths is a difficult subject for many students and sometimes you might struggle in finding the right solution.

That is why a readymade solution by experienced teachers is a valuable resource for anyone who wants to master the subject and also prepare for various prestigious competitive exams.

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