Home
Class 12
PHYSICS
Potential difference between the two bru...

Potential difference between the two brushes of generator is found to be 200 V when current of 5 A is being delivered by it. When current delivered by the same generator is 10 A, then potentail difference between the brushes of generator becomes 180 V. What is the induced emf and resistance of armature coil ?

Text Solution

AI Generated Solution

To solve the problem, we need to determine the induced electromotive force (emf) and the internal resistance of the armature coil of the generator based on the given potential differences and currents. ### Step-by-Step Solution: 1. **Understanding the Problem:** We have two scenarios with different currents and corresponding potential differences: - When the current (I1) is 5 A, the potential difference (V1) is 200 V. - When the current (I2) is 10 A, the potential difference (V2) is 180 V. ...
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises ( Very short Annwer Qustion )|71 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises ( Additional Questions )|10 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise NCERT FILE EXEMPLAR PROBLEMS Subjective Question (VERY SHORT ANSWER TYPE QUESTIONS)|13 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos

Similar Questions

Explore conceptually related problems

The brush potential of a separately excited generator, when it is delivering 5 A is 125 V. When the generator dilivers 15 A, the potential difference across the brushes fall to 122 V. What are the induced e.m.f. and the resistance of armature ?

The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the 3 source. What current will the heater draw if the potential difference is increased to 172.5 V?

The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V ?

The potential difference between the terminals of an electric heater is 60V when it draws a current of 4A from the source. What current will the heater draw if the potential difference is increased to 165V?

The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V?

A generator develops an e.m.f. of 120 V and has a terminal potential difference of 115 V, when the amature current is 25 A. What is the resistance of the armature ?

A cell has emf of 2.2 V, when connected to a resistance of 5 Omega , the potential difference between the terminals of the cell becomes 2.1 V, the internal resistance for the cell is

The potential difference across the terminals of a battery is 8.4 V when there is a current of 1.50 A in the battery from the negative to the positive terminal. When the current is 3.50 Air , the reverse direction, the potential difference becomes 9.4 V . (a) What is the internal resistance of the battery? (b) What is the emf of the battery?

A battery of emf 2.0 V and internal resistance 0.10 Omega is being charged with a current of 5.0 A . Find the potential difference between the terminals of the battery?