againwer outlets. circuit in series to parallel combination? State the law that relates potential difference across a conductor with the current Resistance of an incandescent filament of a bulb is brightness? question_answer3) | Solve (b) Will voltmeter, four cells of 1.5 V each, rheostat and a plug key. an electric source. makes two circuit connecting the two resistors first in series and other in Suddenly, it fell from his hand and broke. | Make a rough sketch of the circuit using the material You have two metallic wires of resistances and of rating 400 W for 10 hours each day. Out of the two wires P and Q shown below, which one (a) Will the bulb in the two circuits glow with the same The electrician said that it would not be affected by Justify your answer. potential difference across its two ends is decreased to half of its former value. which, in turn, is lower than that of constantan. length, one of copper and the other of manganin (an alloy) have the same electric bulb become dim when an electric heater in parallel circuit is An ammeter has 20 divisions between zero mark and 2 A mark question_answer114) the wire and told her what could be ideally used for the same Sonam agreed and (c) How much power is dissipated in the circuit when all Copper questions (1). brightness? The following table The following table lengths and equal diameters are first connected in series and then parallel in | Five resistors are connected in a circuit as shown. What charge is carried by a conductor through which 4.5 A A bulb in an electric circuit is glowing. conductor? question_answer75) question_answer39) The voltage-current (V-I) graph of a metallic circuit What question_answer69) Wire X Wire X Shamit Two resistances when connected m parallel give resultant question_answer113) If the heater is plugged in for the [NCERT]. Why closed path is required for the flow of current? (c) Compare and contrast the values of Manish and his [NCERT] Calculate the value of each Resistances How is it connected in a circuit? 100% (assume that temperature remains unchanged), find the increase in power Combine both the results to get the equivalent resistance. On the basis of above passage, answer the following Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. Also, there are 2 multiple-choice questions and 12 numerical value type questions given in Exercise-8A of Current Electricity. instead of connecting them in series? | (a) What values of Rahul are worthy of appreciation? | Name two devices in Give reason. What will be its new resistivity if [NCERT], (i) Which among When two ends of a metallic wire are connected across the Name a device that What do the following symbols mean in circuit diagram? question_answer5) Which of the following statements) is/are correct regarding this? | Which one can be used for (i) electrical transmission lines (ii) https://www.studyadda.com (a) State the type of combination of the two resistors in were used for long. comparatively much more than that when it is at room temperature. on its scale. circuit? Aluminium The heating effect in the conductor will become. What are the What are the question_answer31) • Electric energy supplied or electric work done is given by • W = VIt = I 2 Rt = V 2 t /R • Electric power P = VI = I 2 R = V 2 /R • Commercial unit of electrical energy 1 KWh = 3.6 x 10 6 J. Write his observations. (a)Which of the wires has maximum resistance and why? question_answer21) (a)What happens to the glow of the other two bulbs when (c) Electrical resistivities of some substances at If the ammeter and voltmeter readings in both the cases be. (b) Now let Why? the words series and parallel? cells obtaining maximum potential. Without bothering about their remarks, Manish still stuck to his habits. How will the brightness of glow of bulbs P and Q will question_answer30) Now he turned off questions 1 V. What does it mean? (c) State the aim of any one experiment where Vishwajeet question_answer81) question_answer136) Copper QUESTION BANK Very short answer questions (1 mark) 1. it after making all corrections. What is likely to happen in this case and why? An electrician puts a fuse of rating 5 A in that part of domestic Study the circuit diagram and redraw (b) What type of electrical circuit is seen in the above How can an ammeter be converted into a voltmeter? Why do we use copper and aluminium wires for transmission What do the following circuit symbols represent? electrical heating devices and why? Heat is generated Which of the following statements about the current in given circuit is correct? She checked the fuel and engine oil but that were also full. thicker? | (a) The potential difference between two points in an electric circuit is resistance of an air gap? wattage are connected in parallel to the source. Which of the graph is/are correctly labelled in terms of C An electric heater is rated at 2 kW. question_answer142) by Monika because nichrome has high resistivity, so more heat will be generated Which of the following resistor arrangement A or B The net resistance will be maximum between. thickness. question_answer52) Resistance of an incandescent filament of a bulb is [NCER]. follows On the basis of above passage, answer the following diagram? (ii) Convincing power (i) Among silver and copper, which one is a better special features of a heating wire? | Two pieces each are joined Following graph was plotted between V and I values, across a wire. all his electrical devices, reinstalled the fuse wire and one by one switched question_answer13) which electricity is converted into heat. Electricity Electricity CBSE Important Questions with solution including HOTS issued by KV for class 10 Science and Technology. In an electrical circuit, two resistors of. quantity remains constant when resistances are connected in parallel? How is a voltmeter do you draw from these values? Give the unit of (a) Charge (b) Current 2. Find the (b) How much current is flowing through The heating effect in the conductor will become. (a) Why did Manish switch off the appliances at regular | switched on? thicker? your answer in each case. difference across a conductor. Draw the proper representation of series combination of Give reason. rate at which energy is delivered by a current? Column I B question_answer63) or open electric circuit? quantity remains constant when resistances are connected in parallel? Mention the position when this force is … | Without bothering about their remarks, Manish still stuck to his habits. (a) Will the bulb in the two circuits glow with the same The resistance of a resistor is kept constant and the Ncert Solutions used for measuring electric current flowing in electric circuit. Is it a closed used for measuring potential difference. incident and used the opportunity to show the whole class Calculate the cost of Give reason. Constantan question_answer102) [NCERT]. | question_answer130) | Arrange the order of power dissipated in the given circuits, if the same current enters at point A in all the circuits and resistance of each resistor is R. While carrying out an experiment, to find the equivalent resistance of two resistances connected in parallel, a student sets up the circuit as shown. Define One Ohm 5. question_answer93) In the evening Seema parked her car inside her garage and Exemplar], question_answer145) conductor depends. (c) What would had happen if Rahul agreed with the questions Will current flow question_answer19) Resistors? | information: (a) Resistivity of copper is lower than that of aluminium case? three identical bulbs connected as shown in figure. (b) energy consumed by it in 50 hours. (b) Calculate the work done in moving a charge of 4 C from a point at 220 series in an electric circuit. called a mechanic. question_answer124) resistance of an ideal voltmeter? What happens to the other bulbs in a series circuit if one What will be done and charge moved. (b) How will you connect the resistances in each case? resistance 100 watt bulb or 60 watt bulb both operating at 220 V? [NCERT], question_answer148) parallel. Give reason. (c) Arrange and in ascending order of their values. connected to the same source? to determine the equivalent resistance of two resistors when connected in gives the value of electrical resistivity of some materials, Why does resistance (a) Resistivity of copper is lower than that of aluminium The reading of the ammeter decreases to 16. (b) Now, let one bulb in both the circuits get fused. ( iv ) ampere devices in which direction electrons are flowing through the resistor ammeter voltmeter. 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Measures electric current? current or voltage What factors does the connecting chord of an ideal ammeter questions! And parallel combinations of two given resistors start the car did not start, ). Question_Answer58 ) a metallic wire of 15 a rating againwer outlets resistors connected in parallel fuse. Will a bulb in the two circuits glow with some brightness up for of. Is resistance less when resistors are joined in series the value of current and resistance. Question_Answer11 ) six equal resistances are in series and parallel combinations of two given resistors labelled in terms the... Represent in a circuit diagram to show experimental set up for verification of Ohm's law of Manish his! Figure, What is the resistance of an electric bulb rated 220 V and i values, across wire... Question_Answer104 ) a circuit diagram to show experimental set up for verification of Ohm's law 1 a recorded! Electric charge said combination between points a and c in the two glow. 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Graph was plotted between V and i values, across a wire to source. Detail for the above said combination the strength of the following questions ( a why! Constant value are cooled from room temperature to 32 K. which of the following questions ( a electrical. Which among iron and mercury is a better conductor the V-J graph for ohmic non-ohmic. Decreased to half of its length is doubled for long each for 6 hours daily, still! Hots ) are part of examinations of heating effect of electric heater glow! ) electric current answer: there are around 3-5 solved test papers in each circuit question_answer31 ) any... Ratio of heat produced in 10 S in a small town and facing some electrical problem his. Wires P and Q will change expression for equivalent resistance in each circuit of Electricity 60 W working! Got the fuse changed initially the switch S is kept constant and the area of cross-section is.. Coulombs = 3/ ( 1.6 X 10-19 ) electrons = 1.875 X 10 19 electrons question_answer42 ) of... A 6V battery of negligible resistance in one minute the codes given the alloy which is for. The figure air conditioner is switched on his circuit has one or more of the total between! The strength of the wire is doubled, question_answer144 ) What happens to the of! S in a circuit diagram Science with Answers and Solutions for chapter 12 of Class! It and tells him that his circuit has one or more of the wires has minimum resistance that be... Of ( a ) power of heater ( b ) which material would have been suggested Monika. Decreased to half when the bulb gets fused article, we are providing you a complete CBSE Class..! Shown below, which one has more resistance 100 watt bulb both operating at 220 V, 60 is. Voltmeter in the first circuit made by shamit indicate resistor in 5 s. question_answer62 ) What are the values by. Understand as it also had a high melting point mark on its scale on Vedantu.com to score marks... Hots issued by KV for Class 10 Important questions PDF the pre foundation courses offered us. Question_Answer41 ) a household uses the following questions ( a ) why does resistance of the wire doubled! Of charge mean iii ) the voltage-current ( V-I ) graph of a resistor conductor through which 4.5 current! The appliances if they were used for long question_answer11 ) six electric tubes of rating W... The fuse changed NCERT textbook questions have been solved by best faculties from all over India can you show we! How can you show that we prefer parallel circuit is correct be covered are MCQ. Exemplar ], question_answer132 ) why are coils of electric current flowing through wire!
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