Home
Class 12
PHYSICS
A metal rod of length of 10 cm and a r...

A metal rod of length of 10 cm and a rectangular cross - section of 1 cm `xx (1)/(2)` cm is connected to a battery across apposite face . The resistance will be .'

A

same irrespective of the three faces

B

maximum when the battery is connected across 1 cm ` xx (1)/(2)` cm faces

C

maximum when the battery is connected across 10 cm` (1)/(2)` cm faces

D

maximum when the battery is connected across 10 cm `xx 1 ` cm faces .

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MODEL TEST PAPER 9

    KCET PREVIOUS YEAR PAPERS|Exercise Physics|60 Videos

  • SOLVED PAPER 04

    KCET PREVIOUS YEAR PAPERS|Exercise PHYSICS|60 Videos

Similar Questions

Explore conceptually related problems

A wire having length 2.0 m diameter 1.0 mm and resistivity 1.963 xx 10^(-8) Ω m is connected in series with a battery of emf 3V and internal resistance I Ω . Calculate the resistance of the wire and current in the circuit.

With a resistance P Omega in the left gap and another resistance Q Omega in the right gap of a meter bridge, the balance point is obtained at 40 cm. When a resistance of 6 Omega is connected across Q, the balance point shifts to 50 cm. The value of resistance P is

An air cored solenoid with length 30 cm , area of cross section 25 cm ^2 and number of turns 500 carries a current of 2.5 A. The current is suddenly switched off in a brief time of 10 ^(-3)s . What is the average back emf induced across the ends of the open switch in the circuit ?

The lid of a rectangular box of sides 40 cm by 10 cm is sealed all round with tape. What is the length of the tape requied?

Calculate the resistance of a metal wire of length 2 m and area of cross section 1·55 xx 10^(-6) m^(2) , if the resistivity of the metal be 2·8 xx 10^(-8) Omega m ?

KCET PREVIOUS YEAR PAPERS-PHYSICS-MCQs
  1. A metal rod of length of 10 cm and a rectangular cross - section of...

    Text Solution

    |

  2. A car has a fresh storage battery of e.m.f 12 V and internal res...

    Text Solution

    |

  3. When a soap bubble is charged ?

    Text Solution

    |

  4. A hot filamnet liberates an electron with zero intital velocity . ...

    Text Solution

    |

  5. Each resistance is the given cubical network has resistance of 1...

    Text Solution

    |

  6. A potentiometer has a uniform wire of length 5 m . A battery of em...

    Text Solution

    |

  7. The colour code for a carbon resistor of resistance 0.28 k Omega ...

    Text Solution

    |

  8. The magnetic field at the orgini due to a current element vec(id...

    Text Solution

    |

  9. I- V characteristic of a copper wire of length of L and area of ...

    Text Solution

    |

  10. In the given figure , the magnetic field at 'O'.

    Text Solution

    |

  11. A paramagentic sample shows a net magnetization of 8 Am^(-1) when ...

    Text Solution

    |

  12. A long cylinder wire of radius R carries a unifrom current I flow...

    Text Solution

    |

  13. A cylotron is used to accelearate protons (""(1)^(1)H). Deuterons ("...

    Text Solution

    |

  14. A rod of length 2 m slides with a speed of 5 ms^(-1) on a rectangl...

    Text Solution

    |

  15. The ratio of magnetic field at the centre of a current carrying circul...

    Text Solution

    |

  16. In a permanent magnet at room temperature

    Text Solution

    |

  17. The power factor of R-L circuit is (1)/(sqrt(3)).If the inductive rea...

    Text Solution

    |

  18. In the given circuit , the resonamt frequency is

    Text Solution

    |

  19. The current in a coil of inductance 0.2 H changes from 5 A to 2 A in 0...

    Text Solution

    |

  20. In the given circuit the peak voltages across C, L and Rare 30 V, 110 ...

    Text Solution

    |