Home
Class 12
PHYSICS
What are the readings of the ammeterA1an...

What are the readings of the ammeter`A_1`and `A_2`shown in figure.Neglect the resistances of the meters.

Text Solution

Verified by Experts

The diode is reverse biased .Hence the resistance is infinite.
So, Current through `A`,is zero .
for `a_2,`
`Current (2)/(10) = 0.2Amp`.
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTOR AND SEMICONDUCTOR DEVICES

    HC VERMA|Exercise objective II|9 Videos
  • PHOTOMETRY

    HC VERMA|Exercise All Questions|44 Videos
  • SPEED OF LIGHT

    HC VERMA|Exercise Exercises|3 Videos

Similar Questions

Explore conceptually related problems

If the reading of ammeter A_(1) in figure is 2.4 A, what will the ammeter A_(2) and A_(3) read? Neglect the resistances of the ammeter.

The resistance of the rheostat shown in figure is 30(Omega) . Neglecting the meter resistance,find the minimum and maximum currents through the ammeter as the rheostat is varied.

Shown an arrangement to measure the emf (epsilon) and internal resistance r of a battery. The voltmeter has a very high resistance and the ammeter also has some resistance.The voltmeter reads 1.52 V when the switch S is open.When the switch is closed the voltmeter reading drops to 1.45 V and the ammeter read 1.0A Find the emf and the internal resistance of the battery.

Find the current measured by the ammeter in the circuit shown in figure

The voltmeter shown in figure reads 18V across the 50(Omega) resistor. Find the resistance of the voltmeter.

The emf (epsilon) and the internal resistance r of the battery shown in figure are 4.3V and 1.0 Ohm respectively.The external resistance R is 50 ohm .The resistances of the ammeter and voltmeter are 2.0 ohm and 200ohm respectively.(a)Find the reading of the two meters.

In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be

A current of 30 A is registered when the terminals of a dry cell of EMF 1.5 VOLTS are connected through an ammeter. Neglecting the meter resistance, find the amount of heat produced in the battery in 10 seconds.

Find the accelerations a_1,a_2,a_3 of the three blocks shown in figure if a horizontal force of 10 N is applied on a. 2 kg block, b. 3 kg block, c. 7 kg block. Take g=10 m/s^2 .

HC VERMA-SEMICONDUCTOR AND SEMICONDUCTOR DEVICES-exercises
  1. In a p-n junction, the depletion region is 400nm wide and and electric...

    Text Solution

    |

  2. The potential barrier exists across the junction is 0.2volt.What minim...

    Text Solution

    |

  3. In a p-n junction,a potential barrier of 250 mev exsists across the ju...

    Text Solution

    |

  4. When a p-n junction is reverse-biased,the current becomes almost const...

    Text Solution

    |

  5. The drift current in a p-n junction is 20(mu)A.Estimate the number of ...

    Text Solution

    |

  6. The current-voltage characteristic of an ideal p-n junction diode is g...

    Text Solution

    |

  7. Consider a p-n junction diode having the characteristic i=i0(e^(eV//kT...

    Text Solution

    |

  8. Calculate the current through the circuit and the potential difference...

    Text Solution

    |

  9. Each of the resistance shown in figure has a value of 20 Omega.Find th...

    Text Solution

    |

  10. Find the current through the resistance in the circuits shown in figur...

    Text Solution

    |

  11. What are the readings of the ammeterA1and A2shown in figure.Neglect th...

    Text Solution

    |

  12. Find the curent through the battery in each of the circuit shown in fi...

    Text Solution

    |

  13. Find the current through the resistance R in figure.If (a)R=12 Omega(b...

    Text Solution

    |

  14. Draw the current-voltage characteristics for the device shown in figur...

    Text Solution

    |

  15. Find the equivalent resistance of the network shown in figure

    Text Solution

    |

  16. When the base current in a transistor is changed from 30 mu A to80 mu ...

    Text Solution

    |

  17. A load resistor of 2 k Omega is connected in the collector branch of ...

    Text Solution

    |

  18. Let X=A bar(BC)+B bar(CA)+C bar(AB).Evalute X for (a)A=1,B=0,C=1 ...

    Text Solution

    |

  19. Design a logical circuit using AND, OR and NOT gate to evaluate A bar(...

    Text Solution

    |

  20. Show that AB+bar(AB) is always 1.

    Text Solution

    |