Home
Class 12
PHYSICS
In a balanced Wheatstone bridge, current...

In a balanced Wheatstone bridge, current in the galvanometer is zero. It remains zero when :
[P] battery emf is increased [Q] All resistances are increased by 10 ohms [R] all resistances are made five times [S] the battery and the galvanometer are interchanged

A

Battery emf is increase

B

The attery and the galvanometer are interchanged

C

All resistance are made five time

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • Mock test 26

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|27 Videos

  • Mock Test 29: PHYSICS

    AAKASH INSTITUTE ENGLISH|Exercise Example|17 Videos

Similar Questions

Explore conceptually related problems

In a balanced wheat stone bridge, current in the galvanometer is zero. If remains zero when- (1) battery emf is increased (2) all resistance are increased by 10 ohms (3) all resistance are made five times (4) the battery and the galvanometer are intercharged

Compute the value of battery current in shown in figure. All resistance are in ohm.

In the circuit shown, the galvanometer shows zero current. The value of resistance R is :

In the circuit shown, the galvanometer shows zero current. The value of resistance R is :

In the circuit, the galvanometer G shows zero deflection. If the batteries A and b have negligible internal resistance, the value of the resistor R will be -

The initial rate of increase of current, when a battery of emf 6 V is connected in series with an inductance of 2 H and resistance 12Omega , is

In a Wheatstone's brigde all the four arms have equal resistance R . If the resistance of the galvanometer arm is also R , the equivalent resistance of the combination as seen b the battery is

An ohm meter measures the resistance placed between its leads. This resistance reading is indicated by a galvanometer that operates on current. The ohm meter has an internal source of voltage to create the necessary current to operate the galvanometer and also has approproate resistor to allow just right amount of current through galvanometer. A simple ohm meter is shown here. When there is an infinite resistance, there is zero current through galvanometer and it points in middle. If the test leads of this meter are directly shorted, (zero resistance) galvanometer will give full deflection. Galvanometer specification Resistance of galvanometer = 100 Omega Fullscale current = 0.5 mA Total number of division =40 .

The instrument used to measure resistance is the Wheatstone bridge with a slide resistance-a wire of high resistivity of length L (Fig. 26.6). Here R is a calibrated resistance, R_x, the unknown resistance. By moving the sliding contact, the current in the galvanometer is made to drop to zero. Making use of this condition (of bridge balance), find the resistance being measured.

An ohm meter measures the resistance placed between its leads. This resistance reading is indicated by a galvanometer that operates on current. The ohm meter has an internal source of voltage to create the necessary current to operate the galvanometer and also has approproate resistor to allow just right amount of current through galvanometer. A simple ohm meter is shown here. When there is an infinite resistance, there is zero current through galvanometer and it points in middle. If the test leads of this meter are directly shorted, (zero resistance) galvanometer will give full deflection. Galvanometer specification Resistance of galvanometer = 100 Omega Fullscale current = 0.5 mA Total number of division =40 . if we want to measure 5 Omega Resistance than what is the position of needle

AAKASH INSTITUTE ENGLISH-Mock Test 28-EXAMPLE
  1. In a balanced Wheatstone bridge, current in the galvanometer is zero. ...

    Text Solution

    |

  2. In the circuit shown in figure, the current / in circuit is

    Text Solution

    |

  3. In the given circuit a meter bridge is shown in balanced state. The va...

    Text Solution

    |

  4. In above question if resistance of meter bridge wire is 1 Omega /cm th...

    Text Solution

    |

  5. In the shows arrangement of a meter bridge, if AC corresponding to nul...

    Text Solution

    |

  6. If in an experminal of wheastone bridge, the position of cells and gal...

    Text Solution

    |

  7. The figure shows a meter bridge wire AC having unifrom area o cross-se...

    Text Solution

    |

  8. In a potentiometer experiment, the balancing with a cell is at length ...

    Text Solution

    |

  9. The current in the primary circuit of a potentiometer is 0.2 A. The sp...

    Text Solution

    |

  10. The length of a wire of a potentiometer is 100 cm, and the emf of its ...

    Text Solution

    |

  11. In the figure the potentiometer wire AB of length L and resistance 9 r...

    Text Solution

    |

  12. Potentiometer is superior to voltmeter because

    Text Solution

    |

  13. The figure shows a potentiometer arrangement. D is the driving cell, C...

    Text Solution

    |

  14. A charge + Q is moving upwards vertically. It enters a magnetic field ...

    Text Solution

    |

  15. If an electron enters a magnetic field with its velocity pointing in t...

    Text Solution

    |

  16. When a charged particle enters ina uniform magnetic field then its kin...

    Text Solution

    |

  17. If a charged particle is moving in a plane perpendicular to a uniform ...

    Text Solution

    |

  18. In a magnetic field vecB=hati+yhatj+3hatk a charge particle (q, m) is ...

    Text Solution

    |

  19. If a chraged particle at rest experiences no electromagnetic force, ...

    Text Solution

    |

  20. An electron is moving along the positive x-axis . A uniform electr...

    Text Solution

    |