Question: a 4 k resistor with a tolerance of ±2% carries a current of 2 A. The current was measured by an analog ammeter with a range of 0 to 4 A with a quoted inaccuracy of 16% of the full scale. The likely maximum error in calculating the power dissipated in the resistor (P = 12R) would be: elect one: D a. 0.0632 Db. 0.24 D c. 0.0872 d. 0.34 B 4:36 PM
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- =9634 Given that the delivered power to a resistor is equal to P when the current flowing in the resistor is la If the current increased to 8.3 la, the delivered power to the resistor will be: Select one: OA. 8.3 P OB. 16.6 P OC. 1378 P OD.0.1P OE 68.9 P Next page 901 PM 4ENG 4/30/2021 Prise Inser Delete FIL 10 Num Lock Backspace 本 6 17 V 12 7 8 9. T. Home Pyup 1 GYH J -IK IL 4 Enter 1 Shift 3 B YN M End Pon 01 AlH Crl Ins Home PgOn EndIn a Wheatstone bridge experiment using a 5 ohm known resistor, the balance point for a certain unknown resistor was at L = 35 cm. The value of the unknown resistor Rx (ohm) is: 1m m Im wwT w Rx(a) In the figure what value must R have if the current in the circuit is to be 0.96 mA? Take &₁ = 2.9 V, E₂ = 4.7 V, and r₁= r₂ = 3.4 2. (b) What is the rate at which thermal energy appears in R? 8,4 R M (a) Number www i (b) Number i 48, ! Units Units
- Near room temperature, the thermo- e.m.f of thermocouple is 30 µV°C. What is the smallest temperature difference that can be detected with single such thermocouple and a galvanometer of resistance 150 N which is capable of detecting current as low as 10 ampere ?The voltage across a component is 100 V r.m.s. and the current is 7 Ar.m.s. If the current lags the voltage by 60°, the apparent power, the power factor and the active power are: Select one: O a. 350W, 0.5 and 700VA O b. 350VA, 0.5 and 175W O c. None of them O d. 700VA, 0.5 and 350 VA(a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ₁ = 2.7 V, 8₂-5.3 V, and r₁ r2 = 3.9 Q. (b) What is the rate at which thermal energy appears in R? www.i R (a) Number (b) Number ww MI -48₂ i N Units Units <
- Problem: In a test to determine the resistance of a single-core cable, an applied voltage 2.5 V was necessary to produce a current of 2A in it at 15° C. of (a) Calculate the cable resistance at 55° C if the temperature coefficient of resistance of copper at 0°C is 1/235 per" C. (b) If the cable under working conditions carries a current of 10A at this temperature, calculate the power dissipated in the cable.(a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ɛ1 = 2.7 V, ɛ2 = 5.5 V, and r1 = r2 = 2.6 2. (b) What is the rate at which thermal energy appears in R? 12 R ww (a) Number i Units (b) Number i UnitsA certain solar cell type has an output capability of 0.9 A at 0.6 V. A series / parallel solar array has been designed of such cells with 144 parallel strings and each string has 210 cells in series. Calculate Current capability of array. Answer:
- If the average of set of voltage reading is 57.6V. The precision for one of the reading 49.4, will be 0.86 O -0.04 O 1.73 1.94A small heater is used to keep critical components from getting too cold in space. The device yields an output of 87.5 kilocalories [kcal] of heat energy over a time span of 2 hours [h]. The circuit contains a 0.4 ohm [2] resistor and is 90% efficient. What is the input voltage in units of volts [V]?A 40 ohm resistor is connected across a 15V variable frequency electronic oscillator. Find the current through the resistor when the frequency is 100Hertz and 100kilohertz