Question

Multiple Choices: 1pt _1. If the resistance of a copper wire is 1002 at 20°C, what is its resistance at 60°C? A. 11662 B. 12522 C. 13492 D. 14322 2. Three resistors of 2022, 60 2 and 100 are connected in parallel. The current through the 100 2 is 120mA. Determine the current through 2012 resistor, A. 1000mA B. 800mA 600mA D. 400mA 3. Three resistors of 6 ohm resistance are connected in delta. Determine the measured resistance of an ohmmeter if connected across between any two corners. A. 422 B.802 C. 1202 D. 692 4. If the entire delta connected resistors are identical, what is the equivalent value of the resistor in WYE connection? AR C. R/2 BR/3 D. R/4 5. A simple circuit consisting of 10V source and 1 unknown resistor. What will be the value of the unknown resistor to achieved a power of 50 watts B. 292 C. 302 D. 492 6. A Im length of wire is found to have a resistance of 2502. If the diameter of the wire is Imm, determine the resistivity in 2-m A. 1.936x10^-5 12-m B. 1.633x10^-5 12-m C. 1.963x10^-592-m D. None of the choices 7. In a resistive circuit, what will happen to the current if there is an increase in the voltage? A. Decreases B. Increase C. same current D. it will not affect 8. A circuit contains a Voltage source, 24V and a resistive load of 122. Calculate the current flowing in the circuit. A 2A B. 2.5A 288A D. not applicable 9. Two resistors R, and R, are connected in series across a voltage source V, Determine the value of the voltage across R A. (R/R,+RJV, B. (R/R+R) C. (R/R,+R) V D. (R/R,+R)

Answer 1

Have answered all the questions. kindly see the attached pictures
6 Resistance at 2000 - 1000r Temporche Coefenest for Coppes a 004041 Resistance = R2 Red (1+x (T-Trek)) + 100 (1+.004041 (50-20)) = 116.164 & 1160 das; - a ② In parallel circuit voltage across all resistors is same, so host and the voltage, then use it to find the corrent Unough 2000 resists. Gius corrent Unough load reostor is 120mt. V IR ve 20 120 X 103 x 100 - 12 Volt Corrent through 20 or reses los = 12 12 20 2.61 2 600mA Dus! - c

GA WRA Re 6 are Re Ro is in serses aith RB and both the combination is in paralell aith RATRB – 1202 (RA+RB) Il Re- & 12x6. · 12+6 402

nelta to wye Connection RA - RABRER RAB + RBC tren ahre RAB, Rre, Rose in the rists in branch of delta, all are equal to R. each 2 R 3R RARAR tas. – B. R Pour - 10x10 - 50 R= 20 R Dus – B. Resis tome 2 e-resistivity e- length A cross sechal Area 25= ex I IT (1X10-32 - 1.963x 10 um Bus: - c

7. According to stan's law the voltage is directly important to corrent at a constant temporcruse. . . If voltage imorcases, then corrent cull also increase Des! – B. V= IR - aber ohm's law Voltage = v Consent - I Resistane =R. 24 = 12I [-27 Das! – A. Cormant In the Var Vei & VR2 Vr Vr Vr2 - KIR2 - - Vil I Rith 2 ( 1 - Red YuTY

- se (RA C dus.