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    Electric Test

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    adifatwani
    Class 10 electricity questions by Aditya Fatwani

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Electric Test

    Uploaded by

    adifatwani
    4 views1 page
    Class 10 electricity questions by Aditya Fatwani

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    electric test

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    Class 10 electricity questions by Aditya Fatwani

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    4 views1 page

    Electric Test

    Uploaded by

    adifatwani
    Class 10 electricity questions by Aditya Fatwani

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
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    Weekly Test

    Time : 1 hr. M.M.: 35

    1. A charge of 150 coulomb flows through a wire in one minute. Find the electric current flowing through it. (2014)
    2. An electric heater rated 800 W operates 6h/day. Find the cost of energy to operate it for 30 days at ₹3.00 per
    unit. (2012)
    3. Explain two disadvantages of series arrangement for household circuit. (2012)
    4. Give two reasons why different electrical appliances in a domestic circuit are connected in parallel. (2013)
    5. Nichrome wire of length ‘l’ and radius ‘r’ has resistance of 10 Ω. How would the resistance of the wire change
    when:
    (i) Only length of the wire is doubled?
    (ii) Only diameter of the wire is doubled? Justify your answer.
    6. Why elements of electrical heating devices are made up of alloys? (2013)
    7. A metallic wire of 625 mm length offers a 4 Ω resistance. If the resistivity of the metal is 4.8 × 10-7 ohm-metre
    then calculate the area of cross-section of the wire. (2013)
    8. A circuit has a line of 5 A. How many lamps of rating 40W; 220V can simultaneously run on this line safely? 2014
    9. Define 1 ohm resistance. (2014)
    10. Find the current drawn from the battery by the network of four resistors shown in the figure. (2015)

    Graph for question - 12

    11. Two lamps, one rated 40W at 220V and the other 100 W at 220V, are connected in parallel to the electric supply at
    220V. (2017 D)
    (a) Draw a circuit diagram to show the connections.
    (b) Calculate the current drawn from the electric supply.
    (c) Calculate the total energy consumed by the two lamps together when they operate for one hour.
    12. (a) Calculate the resistance of the wire using the graph.
    (b) How many 176 Ω resistors in parallel are required to carry 5 A on a 220 V line?
    (c) Define electric power. Derive relation between power, potential difference and resistance. (2012)

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