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2. In Fig. 2-1, a current I flows through a thin strip of metal. The strip has a thickness a, width b, and length c. We assume that there are n electrons. with a charge of -q(< 0) per unit volume and they all move with speed u. (1) Find the number of electrons passing through the strip in time t. (a) nabct (c) nc²vt (d) nabut (f) ncavt (a) (d) (2) Which of the following is the correct formula for the magnitude of the current I? qnabc nabc (a) (d) (b) (e) qB bev B (4) Find the formula for V. (a) (d) (b) (e) Bbc Bra Now we apply a magnetic field B perpendicular to the strip as shown in Fig. 2-2. A voltage V, which is perpendicular to the current and the magnetic field, is produced by charge accumulation on sidewalls. (3) Find the magnitude of the magnetic force on the electrons moving with speed v. nabt nbcut (b) (e) (b) (e) qnabo nabv (b) (e) vB qu B Bab Bbcu (5) Find the formula for n that contains B, I, and V. BI RI (a) (d) (c) (f) teate (c) (f) qnab nab (c) (f) (c) (f) bc B qbcB Buc Bub afeato

2. In Fig. 2-1, a current I flows through a thin strip of metal. The strip has a thickness a, width b, and length c. We assume that there are n electrons. with a charge of -q(< 0) per unit volume and they all move with speed u. (1) Find the number of electrons passing through the strip in time t. (a) nabct (c) nc²vt (d) nabut (f) ncavt (a) (d) (2) Which of the following is the correct formula for the magnitude of the current I? qnabc nabc (a) (d) (b) (e) qB bev B (4) Find the formula for V. (a) (d) (b) (e) Bbc Bra Now we apply a magnetic field B perpendicular to the strip as shown in Fig. 2-2. A voltage V, which is perpendicular to the current and the magnetic field, is produced by charge accumulation on sidewalls. (3) Find the magnitude of the magnetic force on the electrons moving with speed v. nabt nbcut (b) (e) (b) (e) qnabo nabv (b) (e) vB qu B Bab Bbcu (5) Find the formula for n that contains B, I, and V. BI RI (a) (d) (c) (f) teate (c) (f) qnab nab (c) (f) (c) (f) bc B qbcB Buc Bub afeato

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a a 151 L'ingl b с C Fig. 2-1 ↑ B wond
Transcribed Image Text:a a 151 L'ingl b с C Fig. 2-1 ↑ B wond
2. In Fig. 2-1, a current I flows through a thin strip of metal. The strip has a thickness a, width b, and length c. We assume that there are n electrons with a charge of -g(< 0) per unit volume and they all move with speed u. (1) Find the number of electrons passing through the strip in time t. (a) nabct (c) nc²vt (d) nabut (f) ncavt (a) (d) (2) Which of the following is the correct formula for the magnitude of the current I? qnabc nabc (b) (e) qB bev B (4) Find the formula for V. (a) (d) (b) (e) Bbc Bva Now we apply a magnetic field B perpendicular to the strip as shown in Fig. 2-2. A voltage V, which is perpendicular to the current and the magnetic field, is produced by charge accumulation on sidewalls. nabt nbcut (3) Find the magnitude of the magnetic force on the electrons moving with speed v. (a) (d) (b) (e) (b) (e) qnabv nabv (b) (e) vB quB (c) (f) Bab Bbcu (5) Find the formula for n that contains B, I, and V. BI (a) BI gaV (d) BI bl (c) (f) qnab nab (c) (c) (f) bcB qbcB Buc Bub BI
Transcribed Image Text:2. In Fig. 2-1, a current I flows through a thin strip of metal. The strip has a thickness a, width b, and length c. We assume that there are n electrons with a charge of -g(< 0) per unit volume and they all move with speed u. (1) Find the number of electrons passing through the strip in time t. (a) nabct (c) nc²vt (d) nabut (f) ncavt (a) (d) (2) Which of the following is the correct formula for the magnitude of the current I? qnabc nabc (b) (e) qB bev B (4) Find the formula for V. (a) (d) (b) (e) Bbc Bva Now we apply a magnetic field B perpendicular to the strip as shown in Fig. 2-2. A voltage V, which is perpendicular to the current and the magnetic field, is produced by charge accumulation on sidewalls. nabt nbcut (3) Find the magnitude of the magnetic force on the electrons moving with speed v. (a) (d) (b) (e) (b) (e) qnabv nabv (b) (e) vB quB (c) (f) Bab Bbcu (5) Find the formula for n that contains B, I, and V. BI (a) BI gaV (d) BI bl (c) (f) qnab nab (c) (c) (f) bcB qbcB Buc Bub BI
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