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NCERT Books For Class Download CBSE Class 10 All Subjects Books Free PDF Jul 12, �� NCERT Class 10 Science Books: National Council of Educational Research and Training publishes NCERT Books for the students of Class 10 Science under the guidance of myboat059 boatplansts of Class 10 must be aware of NCERT Books for Class 10 Science (Physics, Chemistry and Biology) in order to prepare for their board exams. Students who are clear with the content that is present in NCERT . MELVIN CALVIN born in Minnesota in April, , received his Ph.D. in Chemistry from the University of Minnesota. He served as Professor of Chemistry at the University of California, Berkeley. Just after world war II, when the world was under shock. Download free printable worksheets for CBSE Class 10 Physics with important topic wise questions, students must practice the NCERT Class 10 Physics worksheets, question banks, workbooks and exercises with solutions which will help them in revision of important concepts Class 10 Physics. These Worksheets for Grade 10 Physics, class assignments and practice tests have been prepared as per.
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Given reason. Question 5 Use the data in Table Thus iron is a better conductor because it has lower resistivity than mercury. Answer: The required circuit diagram is shown below :. What would be the readings in the ammeter and the voltmeter? Solution: The required circuit diagram is shown on the right. Answer: When the resistances are connected in parallel, the equivalent resistance is smaller than the smallest individual resistance.

What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?

Question 3 What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series? Answer: Advantages of connecting electrical devices in parallel with the battery are :. Solution: i Highest resistance can be obtained by connecting the four coils in series. Question 1 Why does the cord of an electric heater not glow while the heating element does? Solution: Heat generated in a circuit is given by I 2 R t. The heating element of an electric heater made of nichrome glows because it becomes red-hot due to the large amount of heat produced on passing current because of its high resistance, but the cord of the electric heater made of copper does not glow because negligible heat is produced in it by passing current because of its extremely low resistance.

Question 2 Compute the heat generated while transferring coulomb of charge in one hour through a potential difference of 50 V. Calculate the heat developed in 30 s. Question 1 What determines the rate at which energy is delivered by a current? Answer: Resistance of the circuit determines the rate at which energy is delivered by a current. Question 2 An electric motor takes 5 A from a V line.

Determine the power of the motor and the energy consumed in 2 h. Question 1 A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. Question 2 Which of the following terms does not represent electrical power in a circuit? Question 3 An electric bulb is rated V and W. Question 4 Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference.

The ratio of 10th Physics Ncert Pdf Reader heat produced in series and parallel combinations would be : a 1 : 2 b 2 : 1 c 1 : 4 d 4 : 1 Answer: c 1 : 4. Question 5 How is a voltmeter connected in the circuit to measure the potential difference between two points?

Answer: A voltmeter is connected in parallel to measure the potential difference between two points. Question 6 A copper wire has diameter 0. How much does the resistance change if the diameter is doubled? Answer: If a wire of diameter doubled to it is taken, then area of cross-section becomes four times.

Question 7 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below : Plot a graph between V and I and calculate the resistance of the resistor. Solution: The graph between V and I for the above data is given Ncert Physics Class 10th Pdf Into below. The slope of the graph will give the value of resistance. Let us consider two points P and Q on the graph. Question 8 When a 12 V battery is connected across an unknown resistor, there is a current of 2.

Find the value of the resistance of the resistor. Question 9 A battery of 9V is connected in series with resistors of 0. How much current would flow through the 12 Q resistor? Thus 4 resistors are needed to be connect. The equivalent resistance is. Question 12 Several electric bulbs designed to be used on a V electric supply line, are rated 10 W.

How many lamps can be connected in parallel with each other across the two wires of V line if the maximum allowable current is 5 A? What are the currents in the three cases? Solution: i When the two coils A and B are used separately. Solution: i The circuit diagram is shown in figure. Question 15 Two lamps, one rated W at V, and the other 60 W at V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is V?

Calculate the rate at which heat is developed in the heater. Question 18 Explain the following: i Why is tungsten used almost exclusively for filament of electric lamps? If the area of cross section of a conductor of fixed length is increased, then resistance decreases because there are more free electrons for movement in conductor. So, they do not become too hot on passing electric current. Electric current, potential difference and electric current, Ohms law, Resistance, Resistivity factors on which the resistance of a conductor depends; Series combination of resistors, parallel combination of resistors; and its application on daily life; Heating effect of Electric current, electric Power, Interrelation between P, V, and R.

Formulae Handbook for Class 10 Maths and Science. Page What does an electric circuit mean? Electric circuit is a continuous and closed path made of conducting wires, through which the electric current flows. It comprises a cell, ammeter, voltmeter, plug key, etc. Define the unit of current.

SI unit of electric current is ampere A. Ampere is the flow of electric charges through an area at the rate of one coulomb per second, i. Question 1: Name a device that helps to maintain a potential difference across a conductor. Answer: Cell or battery eliminator. Question 2: What is meant by saying that the potential difference between two points 10th Class Physics Notes Pdf Ncert Al is 1 V? Question 3: How much energy is given to one coulomb of charge passing through a 6 V battery Answer:.

Question 1: On what factors does the resistance of a conductor depend Answer: Resistance of a conductor depends upon: i Resistivity of the material. Question 2: Will current flow more easily through a thick wire or thin wire of the same material when connected to the same source? Question 3: Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value.

Answer: Hence, the current through an electrical component also becomes half of its previous value. Question 4: Why are the coils of electric toasters and electric irons made of an alloy rather than a pure metal Answer: The coils of electric toaster and electric iron are made of an alloy rather than a pure metal because of the following reasons; i The resistivity of an alloy is higher than that of a pure metal.

Question 5: Use the data in Table Question 2: Redraw the circuit of the above question, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the voltage across the 12 resistor.

What would be the reading in the ammeter and the voltmeter? Question 1: Judge the equivalent resistance when the following are connected in parallel. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances and what is the current flows through it? Question 3: What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

Answer: Advantages of connecting electrical devices in parallel:. Answer: a The highest resistance is secured by combining all four coils of resistance in series.

Question 1: Why does the cord of an electric heater not glow while the heating element does? Answer: The cord of an electric heater is made up of metallic wire such as copper or aluminum which has low resistance while the heating element is made up of an alloy which has more resistance than its constituent metals. Question 2: Compute the heat generated while transferring C of charge in one hour through a potential difference of 50 V. Question 3: An electric iron of resistance 20 Q takes a current of 5 A.

Question 1: What determines the rate at which energy is delivered by a current? Answer: Electric power determines the rate at which energy is delivered by a current. Question 2: An electric motor takes 5 A from a V line. Question 1: A piece of wire of resistance R is cut into five equal parts. Question 2: Which of the following terms does not represent electrical power in a circuit?

Question 3: An electric bulb is rated V and W. Question 4: Two conducting wires of same material and of equal lengths and diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be a b c d Answer:. Question 5: How is a voltmeter connected in the circuit to measure the potential difference between two points?

Question 6: A copper wire has a diameter 0. Question 7: The values of the current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below: Plot a graph between V and I and calculate the resistance of that resistor.

Question 8: When a 12 V battery is connected across an unknown resistor, there is a current of 2. Question 9: A battery of 9 V is connected in series with resistors of 0.

Answer: Since all the resistors are in series, the same current, 0. Question Several electric bulbs designed to be used on a V electric supply line, are rated 10 W. Question A hot plate of an electric oven connected to V line has two resistance coils A and B, each of 24 Q resistance, which may be used separately, in series, or in parallel.

Question Two lamps, one rated W at V, and the other 60 W at V, are connected in parallel to electric mains supply. Question An electric heater of resistance 8 f2 draws 15 A from the service mains 2 hours. Question Explain the following. Answer: a It has high melting point and emits light at a high temperature. Each of them dissipates energy and can withstand a maximum power of 18 W without melting.

Find the maximum current that can flow through the three resistors. Question 2: Should the resistance of an ammeter be low or high? Give reason. Answer: The resistance of an ammeter should be low so that it will not disturb the magnitude of current flowing through the circuit when connected in series in a circuit. Question 3: How does use of a fuse wire protect electrical appliances? Answer: The fuse wire is always connected in series with the live wire or electrical devices.

If the flow of current exceeds the specified preset value due to some reason, the heat produced melts it and disconnects the circuit or the device from the mains. In this way, fuse wire protects the electrical appliances. Question 4: What is electrical resistivity? In a series electrical circuit comprising a resistor made up of a metallic wire, the ammeter reads 5 A. The reading of the ammeter decreases to half when the length of the wire is doubled.

Answer: The resistance offered by a metallic wire of unit length and unit cross-sectional area is called electrical resistivity. Hence, when the length of wire is doubled, the resistance becomes double and current decreases to half. Calculate the resistance of the electric lamp.

Question 6: Why is parallel arrangement used in domestic wiring? It is an Academic Institution assisting educational based competition and enhancing competitive spirit among the School- Level students.

The Science Previous Pause Next. Online Test for Class X Chemistry. Online Test for Class X Mathematics. Online Test for Class X Physics. Online Test for Class X Science. Printable Worksheets Download Worksheets for Class 10 Physics made for all important topics and is available for free download in pdf, chapter wise assignments or booklet with Notes Free revision notes, brief chapter explanations, chapter summary and mind maps for all important and difficult topics of CBSE Class 10 Physics as per Printable Assignments Download Class 10 Physics assignments.

High Order Thinking You can do the online tests any number of times that you want. After finishing the online MCQs based tests you can check your score and also all the correct answers. You can attempt thousands of free online tests here. Read More. Classes Class XII.

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