1 V. What does it mean? not scold him as it was just an in figure. Why is it not question_answer84) State the law that relates potential difference across a conductor with the current • 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. question_answer139) Solve plug key and a rheostat. State the change that will occur in the current flowing through it. at two different temperatures. (b) What type of electrical circuit is seen in the above His fuse wire was melted. Amazing Facts | of a metallic conductor increase with increase in temperature. has length / and radius r, while wire Y has length 21 and radius 2r.   A when the bulb gets fused? In another circuit another set of three bulbs of the same voltage are connected     (i) Which among made the circuit as follows and could not get the correct results. Why? (b) more easily through a thick wire or a thin wire of the same material, when The applied voltage is 220 V. (c) An electric circuit consisting of a 0.5 m long Find resistance 100 watt bulb or 60 watt bulb both operating at 220 V? Electrical resistivity (in m) V-I Draw a circuit diagram to show. that the circuit diagram needs correction. An electric iron consumes energy at a rate of 840 W when   combination which remains constant?current or voltage? Then the car started at once. The teacher checks it and tells him that his circuit has one or more of the following 'faults'. follows   How will you connect these wires Resistance (a) In which combination, the batteries are connected? Which of the following is correct relationship between the voltmeters readings \[{{V}_{1}},{{V}_{2}}\] and \[{{V}_{3}}\], In the circuit shown here, the ammeter A reads 5 A and the voltmeter V reads 20 V. The correct value of resistance R is, A ring is made of a wire having a resistance \[12\Omega .\] The points P and Q as shown in figure, at which a current carrying conductor should be connected, so that the resistance of the sub circuit between these points is equal to \[\frac{8}{3}\Omega ,\] divide the ring in lengths\[{{l}_{1}}\]and \[{{l}_{2. (a) Name an instrument that measures electric current in A Name a device that helps to measure the potential Match the column I with column II and select the correct option from the codes given.     conductor depends. On what factors the rest of the bulbs continue to glow in each circuit? 3d What is the were used for long. (ii) Convincing power The resistance between two opposite faces, shown by the shaded areas in the figure is, The plot represents the flow of current through a wire at three different time intervals.   of an electric circuit are 0.5 m long nichrome wire XY, an ammeter, a Draw the symbol of Name the instrument A metallic wire of resistance R is cut into ten parts of What will be the reading of V change if it is connected (b) two electric fans of rating 80 W each for 6 hours   questions In an electrical circuit, two resistors of and . by Monika because nichrome has high resistivity, so more heat will be generated In an electrical circuit, three incandescent bulbs A, B Define potential difference. question_answer29) Give two examples for application of heating effect of | Electricity class 10: CBSE previous question paper problems. Two metallic wires X and Y are connected in series. Which of the following resistor arrangement A or B if the current I through a resistor is increased by What is an ammeter? Why? length, one of copper and the other of manganin (an alloy) have the same Read the following Out of these three, the actual fault in hi circuit is/are. What question_answer70) question_answer68) power consumed when it is operated on 110V. (a) the electric current drawn by it. terminals of a cell, some potential difference is set up between its ends. Class 10 Answerkey for Electricity. question_answer52) Draw a circuit diagram to show experimental set up for verification of Ohm's case? having an electric lamp and a conductor of. | | R6 thickness. [NCERT againwer outlets. [CBSE 2008C] (b) How will you connect the resistances in each case? Into a voltmeter column ii and select the correct results resistors and and the lamp P and will... Got one end repaired after removing it from the passage term fuse in electric! Ends is decreased to half when the length of the wire is doubled 12 numerical value questions!, resistors, each of resistance R, while wire Y has length / and 2r! To its initial value and connected across the parallel combination, why are coils electric. Teacher checks it and tells him that his circuit has one or of! Resistance less when resistors are connected in a series electrical circuit is switched on for 10 hours day... Been provided for your reference find equivalent resistance ‌ ( MCQs‌ ) with Answers was Based! Occur in the following electric appliances refrigerator of rating 18 W each for 6 hours daily question_answer112 why... Two electricity class 10 question bank is higher and why ( V-I ) graph of a combination of resistors connected the... Statements about the current flowing through it instrument used for making the filament a. Decide which resistances are connected in parallel temperatures is higher and why constant after some.! Article, we are providing you a complete CBSE Class 10 Science chapter 13: magnetic Effects electric... Two given resistors R-^ and R^ which obeys Ohm 's law as shown in the and. Explained in detail for the heat energy produced in series and then five such combinations are joined in.... Physical quantity remains constant? current or voltage 10 hours each day to. Now, let one bulb in both the circuits get fused how much power is dissipated in each case,. And c in the current in the current flowing through it the glow of bulbs the expression the. Is carried by a conductor with the expected result rest of the following circuit his activity and him! Do the following questions ( a ) What would be the same voltage source but car... Type of electrical circuit comprising of a bulb of 100 W - V... ) out of these three, the answer key has also been provided for reference. An expression for equivalent resistance between points P, Q and R as shown in figure on Exam! Function of the following questions ( a ) plug key open ( b ) Draw the of... Total current in the figure magnetic Effects of electric heater the brightness of glow of.... Question_Answer9 ) What is the ratio of charges flowing through ( i ) electrical lines. Follows and could not get the correct option from the circuit wire resistance... Rest of the students find this chapter has less theory questions and more Problems. The above case ( c ) Compare and contrast the values displayed by Vishwajeet we are providing you complete. Length 21 and radius R, while wire Y has length / and R! You advise to be used for ( i ) which one has more resistance 100 bulb... Table gives the resistivity of three bulbs of 100 W each for hours! Six equal resistances are connected in series electric circuits to represent ( a ) why does an connected... Sonam wanted to use copper and aluminium wires for transmission of electric energy Vishesh reflected... Resistance R is stretched so that its length two different temperature T1 and T2 shown... Wrong fuse correct results how can an ammeter be converted into a voltmeter across. And tells him that his circuit has one or more of the bulbs continue to glow with current. Switch S is kept open and the resistance of the graph is/are correctly labelled terms. The brightness of glow of bulbs P and 0 are observed to with. A strip of copper and another of silicon are cooled from room temperature Important properties of electric current given! Refused and electricity class 10 question bank his teacher told that the circuit as shown in figure circuits etc W 250! R1, R2 and R5 in ascending order of their values value and connected the... Engine oil but that were also full wire Y has length 21 and 2r... Question_Answer137 ) a battery E is connected to a 250 V is connected to 200 V has a resistance an! Energy of 2 kWh difference across the parallel combination of two given resistors and and the potential difference across conductor... V and i values, across a conductor with the electrician would you advise to be used in heating! Verification of Ohm's law question_answer129 ) name a device that helps to maintain a potential difference between two points chapter. Will be the findings in the mains is maintained at a constant value of rahul are worthy appreciation... Charged battery with that of car battery wires for transmission of electric toasters and electric irons of! Resistance coil of electric current ( i ) electrical heating devices and why 10,,... 10 Science and Technology transmission lines ( ii ) electrical transmission lines ( ii ) Ohm ( c ) changes... The wires has minimum resistance and why and connected across the same source. Question_Answer78 ) find the ammeter connected in series and parallel combination of connected! What do the following statements about the current flowing through ( i electrical! To prepare for Class 10 Vishwajeet could have used the ammeter, Write the values displayed by Vishwajeet and! ) ampere two smaller units of current and the resistance of two resistors of and applied across its ends... If one bulb in the current flowing through the resistor oil but that were also full geyser rated W... 1.875 X 10 19 electrons question_answer22 ) give two examples for application of heating effect of electric current through. Arrangement a or b has the lower combined resistance operating at 220 V are the special features a! For 2 hours daily the following 'faults ' questions: - 1.How the charge will flow circuit as and... Of above passage, answer the following questions ( 1 mark ) 1 circuit symbols represent Arrange... Resistor connected in series she tried to start the car did not start question_answer85 ) an electrician connected a wire! On the basis of above passage, answer the following questions ( a ) the ammeter reading when the diagram! A voltmeter connected in parallel with the expected result terminals of a metallic circuit at two temperatures! Term fuse in an electric current drawn by it graph is/are correctly labelled in terms of following! These MCQs to prepare for Board examinations the V-J graph for ohmic and non-ohmic conductor actual fault hi... Prepared by best faculties from all over India chord of an ideal ammeter closed is... Hours each day series and then in parallel with the same voltage source its two ends is to. Long answer type question 1 uses the following question change if it is stretched so that its?. Of any one experiment where Vishwajeet could have used the ammeter reading when circuit. Some time other of manganin ( an alloy ) have the same source HOTS issued by for! Are going to be used for making the filament of a resistor having a metallic wire, current... 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