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Current Electricity Test - 127
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Current Electricity Test - 127

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  • Question 1/10
    4 / -1
    Electrochemical equivalent of a metal is 3.3 × 10-7 kg/coulombs. The mass of the metal liberated at the cathode when a 3A current is passed for 2 seconds will be
    Solutions

  • Question 2/10
    4 / -1
    The temperature of inversion of a thermocouple is 620ºC and the neutral temperature is 300ºC. What is the temperature of cold junction?
    Solutions

  • Question 3/10
    4 / -1
    A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
    Solutions

  • Question 4/10
    4 / -1
    Two voltameters, one of copper and another of silver, are joined in parallel. When a total charge q flows through the voltameters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are z1 and z2 respectively and charge which flows through the silver voltameter is
    Solutions

  • Question 5/10
    4 / -1
    A rigid container with thermally insulated walls contains a coil of resistance 100Ω, carrying current 1A. change in internal energy after 5 minute will be
    Solutions

  • Question 6/10
    4 / -1
    For ensuring dissipation of same energy in all three resistors (R1, R2, R3) connected as shown in Fig., their values must be related as

    Solutions

  • Question 7/10
    4 / -1
    A 5.0 ampere current is set up in an external circuit by a 6.0 volt storage battery for 6.0 minutes. The chemical energy of the battery is reduced by
    Solutions

  • Question 8/10
    4 / -1
    A capacitor of capacitance 3μF is first charged by connecting across a 10 V battery, then it is allowed to get discharged through 2Ω and 4Ω resistor by closing the key K Fig. The total energy dissipated in 2Ω resistors is equal to

    Solutions

  • Question 9/10
    4 / -1
    In the circuit shown in the Fig., the 5Ω resistance develops 20.00 cal/s due to the current flowing through it. The heat developed in 2Ω resistance (in cal/s) is

    Solutions

  • Question 10/10
    4 / -1
    The resistor in which maximum heat will be produced is

    Solutions

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