EASY
12th CBSE
IMPORTANT
Earn 100

Is internal resistance a defect of a cell?

Important Questions on Current Electricity

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 36
Why is the terminal voltage of a cell less than its emf?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 37

Plot a graph showing the variation of current 'I' versus resistance 'R', connected to a cell of emf ε and internal resistance 'r'.

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EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 38
You are given a primary and a secondary cell of the same emf. From which cell will you be able to draw larger current and why?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 39
A car battery has an emf of 12 V. Eight ordinary cells connected in series can also supply 12 V. But we do not use such an arrangement of cells in the car. Why?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 40
Why does the conductivity of a semiconductor increase with rise of temperature?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 41
Two materials Si and Cu (or Ga As and Ag) are cooled from 300 K to 60 K. What will be the effect on their resistivity?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 42
Why resistance becomes more in series combination?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 43
Why resistance becomes less in parallel combination?