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(a) (b) Figure 11.9 A thin strip of metal immersed in a magnetic field is used to test the Hall effect. (a) Here negative charge carriers are forced to the right. (b) In this configuration, the buildup of nega- tive charge on the right side (with a corresponding positive charge on the left) sets up the electric field as shown. This creates an clectric force on the charge carriers equal and opposite to the magnetic force. The volumeter (reading VH) can detect the magni- tude and sign of the potential difference across the strip.

(a) (b) Figure 11.9 A thin strip of metal immersed in a magnetic field is used to test the Hall effect. (a) Here negative charge carriers are forced to the right. (b) In this configuration, the buildup of nega- tive charge on the right side (with a corresponding positive charge on the left) sets up the electric field as shown. This creates an clectric force on the charge carriers equal and opposite to the magnetic force. The volumeter (reading VH) can detect the magni- tude and sign of the potential difference across the strip.

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Consider the experimental arrangement of Figure, set up to observe the Hall effect. With the power supplies and meters in this confi guration, what will be the sign of the voltage on the voltmeter if the sample is a semiconductor in which the majority of charge carriers are holes? Explain.

(a) (b) Figure 11.9 A thin strip of metal immersed in a magnetic field is used to test the Hall effect. (a) Here negative charge carriers are forced to the right. (b) In this configuration, the buildup of nega- tive charge on the right side (with a corresponding positive charge on the left) sets up the electric field as shown. This creates an clectric force on the charge carriers equal and opposite to the magnetic force. The volumeter (reading VH) can detect the magni- tude and sign of the potential difference across the strip.
Transcribed Image Text:(a) (b) Figure 11.9 A thin strip of metal immersed in a magnetic field is used to test the Hall effect. (a) Here negative charge carriers are forced to the right. (b) In this configuration, the buildup of nega- tive charge on the right side (with a corresponding positive charge on the left) sets up the electric field as shown. This creates an clectric force on the charge carriers equal and opposite to the magnetic force. The volumeter (reading VH) can detect the magni- tude and sign of the potential difference across the strip.
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