# Physics II Lab w answers_Part_50 - 1 qn where q is the...

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111 qn R H 1 = (3) where q is the charge. From Equation (3), it is clear that the sign of charge carrier and density can be estimated from the sign and value of Hall coefficient R H . R H can be obtained by studying variation of V H as a function of I for given B. Experimental Set-up Sample is mounted on a sunmica sheet with four spring type pressure contacts. A pair of green colour leads are provided for current and that of red colour for hall voltage measurement. Note the direction of current and voltage measurement carefully. Do not exceed current beyond 10 mA . The unit marked "Hall Effect Set-up" consists of a constant current generator (CCG) for supplying current to the sample and a digital milli voltmeter to measure the Hall voltage. The unit has a digital display used for both current and Hall voltage measurement. For applying the magnetic field an electromagnet with a constant current supply is provided. It is capable of generating a magnetic field of 7.5 Kgauss between its pole

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## Physics II Lab w answers_Part_50 - 1 qn where q is the...

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