Home
Class 12
PHYSICS
If i=0.25 amp. In fig then value of R is...

If i=0.25 amp. In fig then value of R is:-

A

`48Omega`

B

`12 Omega`

C

`120Omega`

D

`42Omega`

Text Solution

Verified by Experts

The correct Answer is:
4
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

find the value (i) |-25|

In Fig.62 ,if ABDE, then the value of x is 25 (b) 3540(d)45

In Fig.63, if ABCD, the value of x is 25 (b) 3515 (d) 20

If a=25 ,then find the value of a^(25^(0))+a^(0^(25)) .

In the circuit shown in fig., the value of I_1+I_2 is

From Fig.5.30, write the values of: (i) sin A (ii) cot A

The resistor of resistance ' R ' is connected to 25 V supply and heat produced in it is 25 J / sec. The value of R is

ALLEN-CURRENT ELECTRICITY-All Questions
  1. If each resistance in the figure is of 9Omega then reading of ammeter...

    Text Solution

    |

  2. In fig. battery E is balanced on 55cm length of potentiometer wire but...

    Text Solution

    |

  3. If i=0.25 amp. In fig then value of R is:-

    Text Solution

    |

  4. 10,000 electrons are passing per minute through a tube of radius 1 cm....

    Text Solution

    |

  5. Seven resistance are connected as shown in the firgure. The equivalent...

    Text Solution

    |

  6. At what temperature will the resistannce of a copper wire become three...

    Text Solution

    |

  7. Two cells , each of emf E and internal resistance r, are connected in ...

    Text Solution

    |

  8. In a network as shown in the figure the potential difference across th...

    Text Solution

    |

  9. There are 8.4xx10^(22) free electrons per cm^(3) in copper. The curren...

    Text Solution

    |

  10. In a typical wheatstone network the resistance in cyclic order are A=1...

    Text Solution

    |

  11. In the circuit shown below, the power developed in 6Omega resistor is ...

    Text Solution

    |

  12. A potentiometer having the potential gradient of 2 mV//cm is used to m...

    Text Solution

    |

  13. A microammeter has a resistance of 100W and a full scale range of 50 µ...

    Text Solution

    |

  14. In the circuit shown here, what is the value of the unknown resistor R...

    Text Solution

    |

  15. A battery has e.m.f. 4 V and internal resistance r . When this battery...

    Text Solution

    |

  16. In the circuit shown here, E(1) = E(2) = E(3) = 2 V and R(1) = R(2) = ...

    Text Solution

    |

  17. AB is a potentiometer wire of length 100cm and its resistance is 10ohm...

    Text Solution

    |

  18. Three resistance of values 2Omega,3Omega and 6Omega are to be connect...

    Text Solution

    |

  19. A battery of electro motive force E is connected in series with a resi...

    Text Solution

    |

  20. Two resistance wires on joining in parallel the resultant resistance i...

    Text Solution

    |