- #1
Pushoam
- 962
- 52
Homework Statement
Homework Equations
The Attempt at a Solution
Since the dependence of resistance upon the tem. is different for metal and semi - conductor ( increase of tem. decreases semi - con. resistivity while increases metal's resistivity.), option c is not the right answer.
Since the electrical conductivity is different for semi - conductor and metal and magnetic field could be taken as an electric field in a different inertial frame, option d will also reveal the nature of the material.
Is absorption spectrum of a metal and semi - conductor categorically different for the given energy - range?
Isn't absorption spectrum unique for every material?
Can the frequecy of the power source reveal the nature of the material?About q.no.39,
the digital voltmeter has to show at least four digits e.g. 4.006 V.
The first digit could be anything between 0 and 5, while the other three digits could be anything between to 9.
To represent a no. 9, I need four bits for 1001. Similarly, to represent each of the three digits, I need 12 bits. And to represent the first digit, I need three bits. So, I need 15 bits.
Or do I have to convert 5.000 into decimal system and then see how many bits are needed?