HARD
12th ICSE
IMPORTANT
Earn 100

Two batteries, each of emf E and internal resistance r, are connected turn by turn in series and in parallel and send current in an external resistance R. Obtain formula for the current in each case.

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 28
Two batteries, each of emf E and internal resistance r, are connected turn by turn in series and in parallel and send current in an external resistance R. Which combination gives more current if R>r.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 28
Two batteries, each of emf E and internal resistance r, are connected turn by turn in series and in parallel and send current in an external resistance R. Which combination gives more current if R<r.
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 1
What is an electric cell? Define emf of a cell. On what factors does the emf of a cell depend?
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 2
Define the emf of a cell in terms of the work done in moving a charge through the cell. Using Joule’s law obtain the equation, emf=I (R+r). 
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 3
Differentiate between emf and PD for a cell. Derive relationship between the two.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 4
The figure below shows a cell of emf E and internal resistance r, connected to a voltmeter Vand a variable resistance R. Deduce the relationship among V,E,R and r. How will V vary when R is reduced?
Question Image
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 5
When a battery of emf E and internal resistance r is connected to a resistance R, a current I flows through it. Derive a relation among E,I,r and R.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 6
State and explain Kirchhoff's laws for electric circuits. What are the conservation laws implied in each law? State the sign convention for current and emf. Use the given circuit for your explanation.
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