Basic Mathematics for Television and RadioPrentice-Hall, 1953 - 405 σελίδες |
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Σελίδα 140
... resistance in ohms . Expressed in symbols , this formula is where E I E = IR = electromotive force = R = intensity of current resistance If I = 3 and R 7. If E = 220 and R = = 40 , what is E ? 456 , how much current flows ? 8. If the ...
... resistance in ohms . Expressed in symbols , this formula is where E I E = IR = electromotive force = R = intensity of current resistance If I = 3 and R 7. If E = 220 and R = = 40 , what is E ? 456 , how much current flows ? 8. If the ...
Σελίδα 141
... resistance of several resistances con- nected in parallel is R = 1 1 / R1 + 1 / R2 + 1 / R3 + · + 1 / Rn • R2 are the where R is the equivalent resistance , and R1 , R2 , R3 parallel resistances . All resistances are measured in ohms ...
... resistance of several resistances con- nected in parallel is R = 1 1 / R1 + 1 / R2 + 1 / R3 + · + 1 / Rn • R2 are the where R is the equivalent resistance , and R1 , R2 , R3 parallel resistances . All resistances are measured in ohms ...
Σελίδα 370
... resistance of the combination 3000 ohms . 13. The change in resistance of a resistor caused by a change in temperature is stated by the equation R1 = Ro [ 1 + a ( T1 - To ) ] where Ro is the original resistance , R1 is the new resistance ...
... resistance of the combination 3000 ohms . 13. The change in resistance of a resistor caused by a change in temperature is stated by the equation R1 = Ro [ 1 + a ( T1 - To ) ] where Ro is the original resistance , R1 is the new resistance ...
Περιεχόμενα
CHAPTER PAGE 1 ADDITION SUBTRACTION MULTIPLICATION AND DIVISION IN ARITHMETIC | 3 |
DEFINITIONS AND SYMBOLS | 12 |
INVOLUTION AND EVOLUTION IN ARITHMETIC | 15 |
Πνευματικά δικαιώματα | |
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algebraic angle answer applied arithmetic Axiom base called Chapter Check circle circuit circumference coefficient common complex condition Construct COROLLARY curve decimal definition denominator difference direction distance divided division Draw drawn electrical engineering equal equation example exponent expression fact factor figure formula fraction frequency functions geometry given greater illustrated inches indicated involved length letters logarithms magnitude mathematical means measure method Multiply necessary negative Note obtained ohms operation parallel perpendicular places polygon positive possible practice Problems Prove quadratic quantity quotient radio radius ratio represented resistance result right angle root rule shown sides similar Simplify sine solution Solve square statement straight line substituted subtract Theorem triangle unit unknown usually vertical voltage volts wave zero