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10th ICSE
IMPORTANT
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What is an ohmic resistor? Give one example of an ohmic resistor. Draw a graph to show its current voltage relationship. How is the resistance of the resistor determined from this graph?

Important Questions on Current Electricity

MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 18
What are non-ohmic resistors? Give one example and draw a graph to show its current-voltage relationship.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 19
Give two difference between an ohmic and non-ohmic resistor.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 20
Figure shows the I-V curves for two resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.
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MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 21
Draw a V-I graph for a conductor at two different temperature. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 22
Define the term resistivity and state its S.I. unit.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 23
Write an expression connecting the resistance and resistivity. State the meaning of symbols used.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 24
State the order of resistivity of (i) a metal, (ii) a semiconductor, and (iii) an insulator.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 8 - Current Electricity>EXERCISE-8(A)>Q 25
 Name two factors on which the resistivity of a wire depends?