EASY
12th CBSE
IMPORTANT
Earn 100

Draw a graph showing variation of resistivity with temperature for nichrome. Which property of nichrome is used to make standard resistance coils?

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 32
Light from a bathroom bulb gets dimmer for a moment when the geyser is switched on. Why?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 33
When a motor car is started, the car lights become slightly dim, why?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 34
Two students A and B were asked to pick a resistor of 15 kΩ from a collection of carbon resistors. A picked a resistor with bands of colours: brown, green, orange while B chose a resistor with bands of black, green, red. Who picked the correct resistor?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 35
Is internal resistance a defect of a cell?
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?