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- 1) A resistor has a value of 20 ohms (Ω) when it is at 15 degrees Celsius. If the coefficient of thermal resistivity is 3.5 x 10-3/ Celsius, determine the value of the resistance at 97 degrees Celsius. Write your result to 3 significant figures. 2) A certain copper wire has a resistance of 10.0 ohm (Ω). a) At what point should the wire be cut so that the resistance of one segment is 4 times the resistance of the other segment? b) What is the resistance of each segment?If two resistors with resistances R1 and R2 are connected in parallel, as in the figure, then the total resistance R, measured in Ohms (Ω), is given by: 1R=1R1+1R2 If R1 and R2 are increasing at rates of .3Ω/s and .2Ω/s, respectively, how fast is R increasing when R1=80Ω and R2=100Ω? ________________ Ω/s (Answer) Please show all steps.Q2- According to the picture, by showing all your calculations clearly, find(a) all the currents I1, I2 and I3 shown,(b) the power given by ε1 and ε2 ,(c) the power dissipated in resistors in Figure.
- Consider the circuit shown in the figure(Figure 1). Suppose the four resistors in this circuit have the values R1= 13 Ω, R2= 6.4 Ω, R3= 6.3 Ω, and R4= 14 Ω, and that the emf of the battery is E= 18 V. Part A: Find the current through each resistor using the rules for series and parallel resistors. Part B: Find the current through each resistor using Kirchhoff's rules.Figure 4 shows the arrangement of 3 resistors, which are connected to 3 sources: 70 V, 60 V and 80 V. i) Using Kirchhoff’s rules, find the current in each resistor shown in Figure . ii) Find the potential difference pass through R1 and R2.37)Consider the circuits shown below. (a) What is the current through each resistor in part (a)? (b) What is the current through each resistor in part (b)? (c) What is the power dissipated or consumed by each circuit? (d) What is the power supplied to each circuit? Please show all work using this. (Actual values, equations, and drawings)
- 3.A. How is the current of Resistor 1 (R1) effected as more resistors, Resistors R2 and R3, are added in series to it? Give answer and reasoning in 2-3 well written sentences B. How is equivalent resistance of a circuit affected as resistors are added in series? Can you identify a mathematical equation that describes the equivalent resistance of a circuit containing only resistors in series? Give your answer in 2-3 well written sentences as well as the equation for equivalent resistance for resistors in series.Consider the circuit shown in the figure(Figure 1). Suppose the four resistors in this circuit have the values R1= 13 Ω , R2 = 7.2 Ω , R3 = 6.3 Ω , and R4 = 10 Ω , and that the emf of the battery is E = 15 V .What is the equivalent resistor, in units of Ohm, between the terminals a and b if you replace R1 by 4 Ohm, R2 by 1 Ohm and R3 by 5 Ohm resistor? Your result must contain two decimal places. Maximum of 5% of error is accepted in your answer.
- 1. Two light bulbs are designed for use at 120 V and are rated at 75W and 150 W. Which light bulb has the greater filament resistance? 2.One electrical appliance operates with a voltage of 120 V, while another operates with 240 V. Based on this information alone, is it correct to say that the second appliance uses more power than the first? 3. A resistor is connected between the terminals of a battery This resistor is a wire, and the following table gives various possibilities for its length and radius. For which one or more of the possibilities is the current in the resistor a minimum? Why?Use the exact values you enter to make later calculations. The figure below shows a battery connected to a circuit. The potential difference across the battery and the resistance of each resistor is given in the figure. (Assume R1 = 11.5 Ω, R2 = 1.30 Ω, and V = 6.50 V.) (I skipped a-c) (d) Using the result from part (c), what is the equivalent resistance (in Ω) of the entire circuit? in Ω (e) What is the current (in A) through the battery (equivalently, the conventional current that exits the positive terminal of the battery and enters the R2)? in A (f) What is the magnitude of the potential difference (in V) across R2? in VWhat is the resistance R� in the figure? (Figure 1) What is the emf of the battery in the figure? Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type