Physics-
General
Easy

Question

The internal resistances of two cells shown are 0.1 capital omega and 0.3 capital omega. If R equals 0.2 capital omega, the potential difference across the cell

  1. B will be zero    
  2. A will be zero    
  3. A and B will be 2V    
  4. A will be greater than 2 V and B will be less than 2 V    

The correct answer is: B will be zero


    Applying Kirchhoff law
    left parenthesis 2 plus 2 right parenthesis equals left parenthesis 0.1 plus 0.3 plus 0.2 right parenthesis i Þ i equals fraction numerator 20 over denominator 3 end fraction A
    Hence potential difference across A
    equals 2 minus 0.1 cross times fraction numerator 20 over denominator 3 end fraction equals fraction numerator 4 over denominator 3 end fraction V (less than 2V)
    Potential difference across B equals 2 minus 0.3 cross times fraction numerator 20 over denominator 3 end fraction equals 0

    Related Questions to study

    General
    Physics-

    n identical cells each of e.m.f. E and internal resistance r are connected in series. An external resistance R is connected in series to this combination. The current through R is

    n identical cells each of e.m.f. E and internal resistance r are connected in series. An external resistance R is connected in series to this combination. The current through R is

    Physics-General
    General
    Physics-

    In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be

    In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be

    Physics-General
    General
    Physics-

    In the circuit shown, potential difference between X and Y will be

    In the circuit shown, potential difference between X and Y will be

    Physics-General
    parallel
    General
    Physics-

    The figure below shows currents in a part of electric circuit. The current i is

    The figure below shows currents in a part of electric circuit. The current i is

    Physics-General
    General
    Physics-

    The magnitude and direction of the current in the circuit shown will be

    The magnitude and direction of the current in the circuit shown will be

    Physics-General
    General
    Physics-

    In the adjoining circuit, the battery E subscript 1 end subscript has an e.m.f. of 12 v o l t and zero internal resistance while the battery E has an e.m.f. of 2volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is

    In the adjoining circuit, the battery E subscript 1 end subscript has an e.m.f. of 12 v o l t and zero internal resistance while the battery E has an e.m.f. of 2volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is

    Physics-General
    parallel
    General
    Physics-

    In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms

    In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms

    Physics-General
    General
    Physics-

    In the circuit given E = 6.0 V, R1 = 100 ohms, R2 = R3 = 50 ohms, R4 = 75 ohms. The equivalent resistance of the circuit, in ohms, is

    In the circuit given E = 6.0 V, R1 = 100 ohms, R2 = R3 = 50 ohms, R4 = 75 ohms. The equivalent resistance of the circuit, in ohms, is

    Physics-General
    General
    Physics-

    For the network shown in the figure the value of the current i is

    For the network shown in the figure the value of the current i is

    Physics-General
    parallel
    General
    Physics-

    Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

    Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

    Physics-General
    General
    Physics-

    The equivalent resistance and potential difference between A and B for the circuit is respectively

    The equivalent resistance and potential difference between A and B for the circuit is respectively

    Physics-General
    General
    Physics-

    The radius of a disc is 1.2 cm. Its area according to idea of significant figures, will be given by:-

    The radius of a disc is 1.2 cm. Its area according to idea of significant figures, will be given by:-

    Physics-General
    parallel
    General
    Chemistry-

    A 0.01 M ammonia solution is 5 % ionized, the concentration of OHions is

    A 0.01 M ammonia solution is 5 % ionized, the concentration of OHions is

    Chemistry-General
    General
    Chemistry-

    Which of the following solution cannot act as buffer?

    Which of the following solution cannot act as buffer?

    Chemistry-General
    General
    Chemistry-

    P to the power of H end exponent of 0.1M Acetic acid is

    P to the power of H end exponent of 0.1M Acetic acid is

    Chemistry-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.