Advertisements
Advertisements
प्रश्न
A carbon resistor is shown in the figure. Using color code, write the value of the resistance.

Advertisements
उत्तर
The given carbon resistor has a 3-color band. The given colors are Green, Violet, and Red. For the first and second colored bands, the values for Green are 5 and Violet is 7. The third band is the multiplier band and the color-code for Red is 100.
Hence the value of the resistance is, R = 57 × 102 = 5700 Ω
APPEARS IN
संबंधित प्रश्न
Using the concept of free electrons in a conductor, derive the expression for the conductivity of a wire in terms of number density and relaxation time. Hence obtain the relation between current density and the applied electric field E.
An electrolysis experiment is stopped and the battery terminals are reversed.
A heater coil is to be constructed with a nichrome wire (ρ = 1.0 × 10−6 Ωm) that can operate at 500 W when connected to a 250 V supply. (a) What would be the resistance of the coil? (b) If the cross-sectional area of the wire is 0.5 mm2, what length of the wire will be needed? (c) If the radius of each turn is 4.0 mm, how many turns will be there in the coil?
In Figure 3 given below, find the value of resistance x for which points A and B are at the same potential:

figure 3
What is the colour code of a carbon resistor having a resistance of 470 Ω and a tolerance of 5%?
Assertion: Bending a wire does not effect electrical resistance.
Reason: Resistance of wire is proportional to resistivity of material.
The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then ______.
A constant voltage is applied between the two ends of a uniform metallic wire, heat ‘H’ is developed in it. If another wire of the same material, double the radius and twice the length as compared to the original wire is used then the heat developed in it will be -
A man covers his body with a blanket of thickness 4 mm. His temperature is 37°C and that of the atmosphere is 27°C. If the coefficient of thermal conductivity of wool is 1.2 × 10-5 MKS units, heat lost by him per hour per square meter area is:
The resistivity of a wire ______
