Obtain the balancing condition for the Wheatstone bridge arrangement as shown in figure below :

Important Questions on DC Circuits and Measurements

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 10

Draw a circuit diagram for comparing two resistances using a metre bridge. Give the principle of the experiment. Why is the method suitable for two resistances of the same order of magnitude?

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 11

With a circuit diagram, explain briefly how a metre-bridge can be used to find the resistance of a given wire. State the formula used.

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 12

Explain with diagram, the principle of a potentiometer. How can its sensitivity be increased? Why is it superior to a voltmeter?

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 13

Draw a labelled circuit diagram of a potentiometer to compare emfs of two cells. Write the working formula (Derivation not required).

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 14

Draw a neat labelled diagram of a simple potentiometer used to measure the emf of a cell and explain briefly its principle. (ISC 2001)

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 15

Draw a labelled circuit diagram of a potentiometer to measure internal resistance of a cell. Write the working formula. (Derivation not required).

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 1

Define emf of a cell and its terminal potential difference. Show that emf of cell is greater than terminal potential difference, when current is withdrawn and emf is lesser when cell is being charged.

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 2

Draw circuit diagram of a balanced Wheatstone bridge and obtain the relationship among the resistors used. Write its applications.