Sofia applies a force of 197 N to pull a pair of identical resistance bands and extend these by 2.5 m. What is the spring constant of a resistance band?
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- A Wheatstone bridge circuit is shown below. In the circuit, Vo = 10.0 V. R₁ R2= 200.092, R3 = 400.0 Q and R4=450.00. The reading of the voltmeter V is: R₁ R₂ V R4 -R3 VoThe capacitor shown below has an initial voltage of 0.15 V before the switch is closed. The resistance is 8.5 x 106 ohms and the capacitance is 2.0 microfarads. How long after the switch is closed in seconds does it take for the voltage across the resistor to drop to 0.083 V? R CH B A DThree resistors of resistances R1 = 14.8 Ω, R2 = 70.3 Ω, and R3 = 39.7 Ω are connected in parallel. What is the equivalent resistance (Req,p)?
- A metal wire of resistance R is cut into eight equal pieces that are then placed together side by side to form a new cable with a length equal to one-eight the original length. What is the resistance of this new cable?14. A strain gauge of 150 Ω nominal resistance with a gauge factor GF=1.8 is mounted on a rod. The 3 m rod stretches by only 3 mm under a heavy stress. What is the change in resistance?A 0.20-ΩF capacitor is to be charged through a resistor so that it becomes 63 percent charged in0.10 s. What should the resistance of the capacitor be?
- What is the diameter of a 1.00 m length of tungsten wire whose resistance is 0.22 Ω? Group of answer choices 1.3 x 10^-4 m 5.7 x 10^-4 m 6.5 x 10^-4 m 4.2 x 10^-4 mWhat is the total resistance of two resistors, R1 = 1.8 Ω and R2 = 24 Ω when they are connected in parallel?PS 2: A 12-volt battery of internal resistance r of 0.05 ohm is to be recharged by a 50-volt dc source at the rate of 8 amperes. a. What resistance R is to be connected in series with the circuit? ANSWER: b. What is the terminal voltage of the battery? c. How much energy in joules is dissipated in the resistor in one hour ? ANSWER: ANSWER:
- PS 2: A 12-volt battery of internal resistance r of 0.05 ohm is to be recharged u, source at the rate of 8 amperes. 30-volt dc a. What resistance R is to be connected in series with the circuit? ANSWER: b. What is the terminal voltage of the battery? c. How much energy in joules is dissipated in the resistor in one hour ? ANSWER: ANSWER:Two 3.0 μF capacitors are in series with a resistor of 150 Ω, a battery of15.0 V, and an open switch. What is the time constant of the circuit? Whatis the equation for the current as a function of time?A wire of initial length L0 and radius r0 has a measured resistance of 1.0 Ω. The wire is drawn under tensile stress to a new uniform radius of r ═ 0.25r0. What is the new resistance of the wire?