Current Electricity MCQs (NEET, JEE Main) – Test 1 3

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  1. 1. Question
    4 points

    A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W. The value of R is [NEET UG 2016]

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  2. 2. Question
    4 points

    The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K, is best described by [JEE Main 2016]

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  3. 3. Question
    4 points

    A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be [CBSE AIPMT 2015]

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  4. 4. Question
    4 points

    A, B and C are voltmeters of resistance R, 1.5R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are VA, VB and VC respectively, then [CBSE AIPMT 2015]

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  5. 5. Question
    4 points

    The supply voltage to a room is 120 V. The resistance of the lead wires is 6 Ω. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb? [JEE MAIN 2013]

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