Home
Class 12
PHYSICS
In the circuit shown the cells A and B h...

In the circuit shown the cells `A` and `B` have negligible resistance. For `V_(A) = 12 V, R_(1) = 500 Omega` and `R = 100 Omega`, the galvanometer `(G)` shows no deflection. The value of `V_(B)` is

A

12V

B

6V

C

4V

D

2V

Text Solution

Verified by Experts

The correct Answer is:
4

`V_(B)=`potential drop across R
`rArr V_(B)=((R)/(R+R_(1)))V_(A)=((100)/(100+500))(12)=2V`
Promotional Banner

Topper's Solved these Questions

  • CIRCULAR MOTION

    ALLEN|Exercise EXERCISE (J-A)|6 Videos
  • GEOMETRICAL OPTICS

    ALLEN|Exercise subjective|14 Videos

Similar Questions

Explore conceptually related problems

In the given circuit the internal resistance of the 18 V cell is negligible. If R_1 = 400 Omega, R_3 = 100 Omega and R_(4) = 500 Omega and the reading of an ideal voltmeter across R_4 is 5 V, then the value of R_2 (in Omega will be _____.

In the circuit shown below E_(1) = 4.0 V, R_(1) = 2 Omega, E_(2) = 6.0 V, R_(2) = 4 Omega and R_(3) = 2 Omega . The current I_(1) is

In the circuit shown in Fig. the emf of the sources is equal to xi = 5.0 V and the resistances are equal to R_(1) = 4.0 Omega and R_(2) = 6.0 Omega . The internal resistance of the source equals R = 1.10 Omega . Find the currents flowing through the resistances R_(1) and R_(2) .

In the given circuit the internal resistance of the 18 V cell is negligible. If R_1=400 Omega,R_3=100 Omega and R_4= 500 Omega and the reading of an ideal voltmeter across R_4 is 5 V, then the value of R_2 will be :

In the given circuit the internal resistance of the 18 V cell is negligible. If R_(1)=400 Omega and the reading of an ideal voltmeter across R_(4) is 5V, then the value of R_(2) will be :

In the circuit shows in Fig. 6.63, the cell is ideal with emf 9 V . If the resistance of the coil of galvanometer is 1 Omega , then

In the circuit shows in Fig. 6.74, the internal resistance of the cell is negligible. For the value of R = 40//x Omega , no current flows through the galvanometer. What is x ?

In the circuit the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance find the value of the resitor R

In the circuit shown here, cells A and B have emf 10 V each and the internal resistance is 5Omega for A and 3Omega for B. For what value of R will the potential difference across thhe cell A will be zero?

The value of resistance of an unknown resistor is calculated using the formula R = V//I where V and I are the readings of the voltmeter and the ammeter, respectivley. Consider the circuits below. The internal resistances of the voltmeter and the ammeter (R_V and R_G, respectively) are finite and nonzero. , Let R_(A) and R_(B) be the calculated values in the two cases A and B , respectively. If the resistance of voltmeter is R_(V) = 1k Omega and the percentage error in the measurement of R (the value of R is nearly 10 Omega )is

ALLEN-CURRENT ELECTRICITY-All Questions
  1. A ring is made of a wire having a resistance R(0) = 12 Omega. Find the...

    Text Solution

    |

  2. If voltage across a bulb rated 22 volt 100 watt drops by 2.5% of its r...

    Text Solution

    |

  3. In the circuit shown the cells A and B have negligible resistance. For...

    Text Solution

    |

  4. A milli voltmeter of 25 milli volt range is to be converted into an am...

    Text Solution

    |

  5. The power dissipated in the circuit shown in the is 30 watts. The valu...

    Text Solution

    |

  6. A cell having an emf E and internal resistance r is connected across a...

    Text Solution

    |

  7. A voltmeter reads the potential difference across the terminals of an ...

    Text Solution

    |

  8. Six resistances each of v ale r=6Omega are connected between points A,...

    Text Solution

    |

  9. When 115V is applied across a wire that is 10m long and has a 0.30mm r...

    Text Solution

    |

  10. In the potentiometer circuit shown in the figure the balance length AJ...

    Text Solution

    |

  11. Figure shows a circuit with three ideal batteries in it. The circuit e...

    Text Solution

    |

  12. In the Bohr's model of hy drogen atom, the electron moves around the n...

    Text Solution

    |

  13. Three copper wires of length and cross-sectional areas are (L,A)(2L,(A...

    Text Solution

    |

  14. When a piece of aliminium wire of finite length is drawn through a ser...

    Text Solution

    |

  15. Every atom makes one free electron in copper. If 1.1 ampere current is...

    Text Solution

    |

  16. A metal wire of resistance R is cut into three equal pieces that are t...

    Text Solution

    |

  17. Two cells X and Y are connected to a resistance of 10Omega shown in th...

    Text Solution

    |

  18. Masses of 3 wires of same metal are in the ratio 1 : 2 : 3 and their l...

    Text Solution

    |

  19. As the temperature of a metallic resistor is increased,the product of ...

    Text Solution

    |

  20. What will b e the equivalent resistance b etween the A and D?

    Text Solution

    |