EASY
Earn 100

If area of cross-section of a metallic wire becomes n times, its resistance becomes

50% studentsanswered this correctly

Important Questions on Electricity

EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Electrical resistivity of a given metallic wire depends upon
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Define the resistivity of a substance.
MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Resistance of a metal wire of length 1 m is 26 Ω at 20°C. If the diameter of the wire is 0.3 mm, What will be the resistivity of the metal at that temperature?
MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends

Write the S.I. unit of resistivity. An electric motor takes 5 A from a 220 V source. Determine the power of the motor and energy consumed in 2 hours.

MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Let CNaCl and CBaSO4, be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO4 respectively, at a temperature T. Which of the following is false?
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
A wire of resistance 1000 Ω and length l is increased to twice its original length. Calculate its new resistance.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Name the factors affecting the resistance of a conductor.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
What are the factors on which the resistance of a conductor depends?
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
If the conductivity of mercury at 0°C is 1.07×106 S m-1 and the resistance of a cell containing mercury is 0.243Ω, then the cell constant of the cell is x×104 m-1. The value of x is ______ . (Nearest integer)
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
 List the factors on which the resistance of a conductor depends.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends

On what factors does the resistance of a conductor depends?

MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
How does an increase in the temperature affect the specific resistance of a Semiconductor?
MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Define conductance and give its unit.
MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
What is resistivity? Write the formula of resistivity. Write the SI unit of resistivity.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
100 mg mass of nichrome metal is drawn into a wire of area of cross-section 0.05 mm2. Calculate the Resistance of the wire Given the density of nichrome 8.4×103 kgm-3 and resistivity of the material is  1.2×10-6 Ω m .
MEDIUM
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Write the four factors affecting the resistance of a conductor.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
What are the factors on which the resistance of a conductor depends? Explain.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Why are alloys commonly used in electrical heating devices? Give reason.
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
How does an increase in the temperature affect the specific resistance of a metal?
EASY
Science>Physics>Electricity>Factors on Which the Resistance of a Conductor Depends
Amongst the following, the form of water with the lowest ionic conductance at 298K is: