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Physics Part-I

Current Electricity

(a) In a metre bridge [Fig.], the balance point is found to be

Physics Part-I

Class 12

NCERT

Chapter 1: Electric Charges and Fields

47 questions

Chapter 2: Electrostatic Potential and Capacitance

46 questions

Chapter 3: Current Electricity

33 questions

Determine the current in each branch of the network shown in Fig.

(a) In a metre bridge [Fig.], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5

Ω

. Detere the resistance of X. Why are the connections between resistors in a Wheat stone or meter bridge made of thick copper strips?(b) Detere the balance point of the bridge above if X and Y are interchanged.
(c) What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer show any current?

A storage battery of emf 8.0 V and internal resistance

0.5Ω

is being charged by a 120 V dc supply using a series resistor of

15.5Ω

. What is the teral voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?

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Chapter 4: Moving Charges and Magnetism

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Chapter 8: Electromagnetic Waves

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Question

Medium

Solving time: 5 mins

(a) In a metre bridge [Fig.], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 $Ω$ . Detere the resistance of X. Why are the connections between resistors in a Wheat stone or meter bridge made of thick copper strips?(b) Detere the balance point of the bridge above if X and Y are interchanged.
(c) What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer show any current?

Uploaded: 2023-08-02T02:34:09.000Z
Duration: 9 min

Views: 6,317 students

Updated on: Aug 2, 2023

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Physics Part-I (NCERT)

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(a) In a metre bridge [Fig.], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5

Ω

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Text solutionVerified

(a) condition for balanced wheatstone bridge,

\frac{X}{Y} = \frac{100 - l _{1}}{l _{1}}

X = 8.2Ω

To minimize the resistance which is not taken into formula.

(b) if X and Y are interchanged then balance of bridge will be at

100 - 39.5 = 60.5 c m

from A.

(c) Since the bridge is balanced, there will be no difference if position of cell and galvanometer are interchanged as there will be no flow of current from galvanometer.

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Practice more questions from Physics Part-I (NCERT)

Determine the current in each branch of the network shown in Fig.

(a) In a metre bridge [Fig.], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5

Ω

A storage battery of emf 8.0 V and internal resistance

0.5Ω

is being charged by a 120 V dc supply using a series resistor of

15.5Ω

. What is the teral voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?

View all

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Question Text	(a) In a metre bridge [Fig.], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 $Ω$ . Detere the resistance of X. Why are the connections between resistors in a Wheat stone or meter bridge made of thick copper strips?(b) Detere the balance point of the bridge above if X and Y are interchanged. (c) What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer show any current?
Updated On	Aug 2, 2023
Topic	Current Electricity
Subject	Physics
Class	Class 12
Answer Type	Text solution:1 Video solution: 1
Upvotes	156
Avg. Video Duration	9 min

Text solutionVerified

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