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In a telegraphis connected to positive t...

In a telegraph______is connected to positive terminal of a battery and the negative terminal of the battery is connected to__________

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Morse Key, earth
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_____are the two terminals of a battery.

An electrode 'A' is connected to the positive termi nal of a battery and electrode 'B' to the negative terminal. Which electrode is the oxidising electrode?

Knowledge Check

  • In order to forward bias a PN junction, the negative terminal of battery is connected to

    A
    `P`-side
    B
    Either `P`-side of `N`-side
    C
    `N`-side
    D
    None of these

  • A battery is of emf E is being charged from a charger such that positive terminal of the battery is connected to terminal A of charger and negative terminal of the battery is connected to terminal B of charger. The internal resistance of the battery is r .

    A
    Potential difference across points `A` and `B` must be more than `E`.
    B
    A must be at higher potential than `B`
    C
    In battery, current flows from positivity terminal to the negative terminal
    D
    No current flows through battery

  • The electrode connected to the negative terminal of the cell/battery is called the ___________

    A
    Anode
    B
    Cathode
    C
    Both (a) and (b)
    D
    None of these

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    __________ are the terminals of a battery.

    Two capacitors of capacitance 1 muF and 2muF are charged to potential difference 20 V and 15 V as shown in figure. If now terminal B and C are connected together terminal A with positive of battery and D with negative terminal of battery then find out final charges on both the capacitor.

    Ansh made an electric circuit by using a dry cell , two electric wires and one electric bulb . First , he connected one end of wire to the positive terminal and another end of wire to the negative terminal of the cell .Now , he connect the bulb to the wire which is connected with the negative terminal of the cell .Does bulb glow ?

    There is one metallic rod AB whose area of cross section decreases from its end A towards the end B. End A of the rod is connected to positive terminal of a battery and end B is connected to its negative terminal. If one moves in a direction from B to A,

    A 2V battery is connected across AB as shown in the figure. The value of the current supplied by the battery when in one case battery's positive terminal is connected to A and in other case when positive terminal of battery is connected to B will respectively be :-

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