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    Cbse Test Paper-04: Science & Technology (Class-10) Chapter 12: Electricity

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    Shivam
    1. The document is a CBSE test paper containing 13 questions about electricity, circuits, resistance, current, and power. The questions cover topics like which metal has higher resistance than copper, calculating resistance and current in series and parallel circuits, Ohm's law, heat generated by electric current, and power calculations. 2. Key questions calculate the resistance of an unknown resistor given voltage and current, current drawn from mains supply by lamps in parallel, heat developed over time by a resistor, current and resistance in a circuit given power and voltage, and energy consumed by a bulb over time. 3. The final question defines electrical resistance, gives the SI unit of resistance, and calculates current in a circuit

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    Cbse Test Paper-04: Science & Technology (Class-10) Chapter 12: Electricity

    Uploaded by

    Shivam
    180 views1 page
    1. The document is a CBSE test paper containing 13 questions about electricity, circuits, resistance, current, and power. The questions cover topics like which metal has higher resistance than copper, calculating resistance and current in series and parallel circuits, Ohm's law, heat generated by electric current, and power calculations. 2. Key questions calculate the resistance of an unknown resistor given voltage and current, current drawn from mains supply by lamps in parallel, heat developed over time by a resistor, current and resistance in a circuit given power and voltage, and energy consumed by a bulb over time. 3. The final question defines electrical resistance, gives the SI unit of resistance, and calculates current in a circuit

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    10 Science Electricity Test 04

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    1. The document is a CBSE test paper containing 13 questions about electricity, circuits, resistance, current, and power. The questions cover topics like which metal has higher resistance than copper, calculating resistance and current in series and parallel circuits, Ohm's law, heat generated by electric current, and power calculations. 2. Key questions calculate the resistance of an unknown resistor given voltage and current, current drawn from mains supply by lamps in parallel, heat developed over time by a resistor, current and resistance in a circuit given power and voltage, and energy consumed by a bulb over time. 3. The final question defines electrical resistance, gives the SI unit of resistance, and calculates current in a circuit

    Copyright:

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

    Cbse Test Paper-04: Science & Technology (Class-10) Chapter 12: Electricity

    Uploaded by

    Shivam
    1. The document is a CBSE test paper containing 13 questions about electricity, circuits, resistance, current, and power. The questions cover topics like which metal has higher resistance than copper, calculating resistance and current in series and parallel circuits, Ohm's law, heat generated by electric current, and power calculations. 2. Key questions calculate the resistance of an unknown resistor given voltage and current, current drawn from mains supply by lamps in parallel, heat developed over time by a resistor, current and resistance in a circuit given power and voltage, and energy consumed by a bulb over time. 3. The final question defines electrical resistance, gives the SI unit of resistance, and calculates current in a circuit

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    © All Rights Reserved
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    CBSE TEST PAPER-04

    SCIENCE & TECHNOLOGY (Class-10)


    Chapter 12 : Electricity

    1.
    2.

    Which metal offers higher resistance to the passage of electricity than copper?
    (1 mark)
    A wire of resistance 10 ohm is bent in the form of a closed circle. What is the effective
    resistance between the two points at the ends of any diameter of this circle?
    (1mark)
    3.
    What is the S.I. unit of charge?
    (1 mark)
    4.
    State ohms law.
    (1 mark)
    5.
    Define electric resistance?
    (1mark)
    6.
    Compute the heat generated while transferring 96000 coulomb of charge in one hour through
    a potential difference of 50 V.
    (2 marks)
    7.
    When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in
    the circuit. Find the value of the resistance of the resistor.
    (2 marks)
    8.
    Two lamps, rated 100 W at 220 V, and 60 W at 220V, are connected in parallel to electrical
    mains supply. What current is drawn from the line if the supply voltage is 220 V? (2 marks)
    9.
    An electric heater of resistance 8 draws 15 A from the service mains 2 hours. Calculate the
    rate which heat is developed in the heater
    (2marks)
    10. An electric iron has a rating of 750 W, 220 V. Calculate
    (i) Current passing through it, and
    (ii) its resistance, when in use.
    (2marks)
    11. A torch bulb is rated 2.5 V and 750 mA. Calculate
    (i) Its power (ii) its resistance and (iii) the energy consumed in 4 hours.
    (3 marks)
    12. Two electric lamps of 100 W and 25 W, respectively are connected in parallel to a supply
    voltage of 200 V. Calculate total current flowing through the circuit.
    (3 marks)
    13. What do you understand by the electrical resistance of a wire? State and define S.I. unit of
    resistance.
    The resistance of an electric lamp filament is 230 ohms. The lamp is switched on when the
    line voltage is 115 volts. What is the current in the lamp circuit?
    (5 marks)

    Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in


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