What current flows through a 2.60-cm-diameter rod of pure silicon that is 18.0 c

Question

What current flows through a 2.60-cm-diameter rod of pure silicon that is 18.0 cm long, when 1.00 103 V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.)
  A

What is the current in the circuit shown in the figure for the following? (Let R = 1 and V = 21 V. Calculate the total current drawn from the battery.)

(a) when the switch is open


(b) when the switch is closed

What is the current in the circuit shown in the figure for the following? (Let R = 1 and V = 21 V. Calculate the total current drawn from the battery.)

(a) when the switch is open


(b) when the switch is closed

For the circuit shown in the figure,

R1 = 6 , R2 = 7 , R3 = 5 , R4 = 2 , R5 = 8 ,

and the potential difference is 27 V. (When entering units, use ohm for .)

(a) What is the equivalent resistance of the circuit?


(b) What is the current through

R5?

(c) What is the potential drop across

R3?

What is the current in the 10- resistor in the circuit in the figure? Let V = 36 V and R = 24 .

Explanation / Answer

Only one question can be posted as per chegg guidelines

1.

Area of rod

A=pi*d2/4 =pi*0.0262/4 =5.31*10-4 m2

Resistance of rod

R=pL/A =2300*0.18/5.31*10-4

R=779,765 ohms

Current

I=V/R =1000/779765

I=1.282*10-3 A or 1.282 mA

2.

a)

equivalent resistance

1/Req =1/(1+1) +1/(5+1)

Req=1.5 ohms

Total Current

I=V/Req=21/1.5 =14 A

b)

equivalent resistance

Req=(1/1 +1/5)-1 +(1/1 +1/1)-1=1.33 ohms

Total current

I=21/1.33 =15.75 A

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.