Home
Class 12
PHYSICS
Three resistors, an ideal cell are conne...

Three resistors, an ideal cell are connected as shown in figure. The switch is initially open. When we close the switch, the current in the resistor `R_(2)` will.

A

Increases

B

decrease

C

remain same

D

increase or decrease depending on the value of `R_(1)`

Text Solution

Verified by Experts

The correct Answer is:
A

Because `R_(3)` is shorted, potential difference across `R_(2)` is increased. Hence current is increased. This increase is independent of value of `R_(1)`.
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    ALLEN |Exercise PAPER 3|92 Videos
  • TEST PAPERS

    ALLEN |Exercise Part-1 Physics|15 Videos
  • TEST PAPERS

    ALLEN |Exercise MATHS|1 Videos
  • TEST PAPER 4

    ALLEN |Exercise PHYSICS|45 Videos
  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN |Exercise Exercise (J-A)|7 Videos

Similar Questions

Explore conceptually related problems

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

Assertion:- To cells of unequal emf E_(1) and E_(2) having internal resistances r_(1) and r_(2) are connected as shown in figure. Then the potential difference across any cell cannot be zero. Reason:- If two cells having nonzero internal resistance and unequal emf are connected across each other as shown, then the current in the circuit cannot be zero.

Consider a magnet surrounded by a wire with an on/off switch S as shown in figure. If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit ? Explain.

Four resistors, each of 10 Omega are connected to form a square as shown in the given figure. Find the eqUivalent resistance between the opposite corner A and C and between two points on anyone side (AB).

An ideal cell is connected across a capacitor as shown in figure. The initial separation between the plates of a parallel plate capacitor is d. The lower plate is pulled down with a uniform velocity v. Neglect the resistance of the cirucit. Then the variation of charge on capacitor with time is given by

n identical cells each of emf epsilon and lnternal resistance r are connected in parallel with resistor R. The current nowing through resistor R is ..........

When two resistors of R value connected in parallel what is equivalent resistance '?

A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' ,and internal resistance 'R'. The current drawn is I. Now, the 'n' resistors arc connected in parallel to the same battery. Then the current drqwn from battery becomes 10 I. The value of 'n' is

A light bulb and an open coil inductor are connected to an ac source through a key as shown in Fig. The switch is closed and after sometime, an iron rod is inserted into the interior of the inductor. The glow of the light bulb (a) increases, (b) decreases, (c) is unchanged, as the iron rod is inserted. Give your answer with reasons.

ALLEN -TEST PAPERS-PAPER 2
  1. Which one of the following equation is correct for the circuit shown. ...

    Text Solution

    |

  2. The following diagram represents an electrical circui containing two u...

    Text Solution

    |

  3. Three resistors, an ideal cell are connected as shown in figure. The s...

    Text Solution

    |

  4. In the diagrams, all light bulbs are identical and all emf sources are...

    Text Solution

    |

  5. In the, Ohm's law experiment ot find resistance of unknown resistor R,...

    Text Solution

    |

  6. An electron passes between two parallel plate of a capacitor as shown ...

    Text Solution

    |

  7. In the figure shown the equivalent capacitance between 'A' and 'B' is ...

    Text Solution

    |

  8. Consider the shown circuit. The capacitor is uncharged when the swith ...

    Text Solution

    |

  9. An uncharged capacitor is connected in series with a resistor and a ba...

    Text Solution

    |

  10. In the circuit shown the capacitor is initially uncharged. The charge ...

    Text Solution

    |

  11. Two large oppositely charged insulated plates have a uniform electric ...

    Text Solution

    |

  12. An alpha is moving along a circle of radius R with a constant angular ...

    Text Solution

    |

  13. A current 1 flows along a triangle loop having sides of equal length a...

    Text Solution

    |

  14. A small current element of length 'dl' and carrying current is placed ...

    Text Solution

    |

  15. Let B(P) and B(Q) be the magnetic field produced by the wire P and Q w...

    Text Solution

    |

  16. A long straight solid metal wire of radius R carries a current I, unif...

    Text Solution

    |

  17. A current carrying wire AB of the length L is turned along a circle, a...

    Text Solution

    |

  18. An electron moving with a velocity v along the positive x-axis approac...

    Text Solution

    |

  19. If the ratio of time periods of circular motion of two charged particl...

    Text Solution

    |

  20. A current flows through a rectangular conductor in the presence of uni...

    Text Solution

    |