Consider the circuit below and answer the following questions. In this sketch, V=5 V, R1=100 2, R2=300 02, and R3=400 2. -www. R₁ a) What is the equivalent resistance of the circuit? b) How much current is drawn from the battery? c) How much power is dissipated by R3?
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- 1. The circuit shown is example of a? 2. According to Kirchoff's current rule, the current in point b is equal to the current in? 3. According to Kirchoff's current rule, the emf in the battery is equal to the potential difference measured between? 4. What is the total resistance in the circuit? 5. What is the total current in the circuit?QUESTION 4 A physics student wishes to measure the voltage change and current across a resistor in a circuit using a voltmeter and an ammeter respectively. How should the student connect the voltmeter and ammeter to the circuit? a. The voltmeter should be connected in series with the resistor, and the ammeter should be connected in series with the resistor. O b. The voltmeter should be connected in series with the resistor, and the ammeter should be connected in parallel with the resistor. C. The voltmeter and ammeter should be connected in a series combination that is, in turn, connected in parallel with the resistor d. The voltmeter should be connected in parallel with the resistor, and the ammeter should be connected in parallel with the resistor. e. The voltmeter should be connected in parallel with the resistor, and the ammeter should be connected in series with the resistor.Use the figure to answer following questions Consider the circuit below. Three identical resistors (each with R = 1 2) are connected to a battery (6 V) forming a series-parallel circuit. R3 Calculate the effective resistance of the circuit. O A. 0.33 2 O B. 0.66 2 OC. 1.5 2 O D.3.0 2 O E. 4.5 2
- Question 3 The electric current I in a circuit shown in the figure was measured as a function of the resistance R in the circuit. The relationship between I and R is given by I = R +r where ɛ is the emf of the battery in the circuit and r is the internal resistance of the battery. E,r a) Linearise the equation above, and state which variable you would plot on the x-axis and which on the y-axis. b) How are ɛ and r related to the gradient and/or y-intercept of the graph?4. If 6 coulombs of charge flow past point A in a circuit in 3 seconds, then the current at point A is a. 18 amperes b. 6 amperes c. 2 Coulombs d. 2 amperes Explain: 5. In which of the following situations will the light bulb light? Justify your answer by comparing the current flow in each case. DBased on the circuit shown below, a. what is the total resistance in the circuit b. according to Kirchoff’s current rule, thecurrent in point b is equal to the current in c. what is the total current in the circuit? d. according to Kirchoff’s current rule, the emf inthe battery is equal to the potential difference measured between
- A Question 3 A4.0 ohm resistor is connected to a 12 volt battery in the circuit shown below. What will happen to the current if the 12 volt battery is replaced with a 6.0 valt battery? gil be halved. B. It will quadruple. C. It will double. It will remain the same.Question 2 Base your answer on the diagram below which shows two different capacitors, Cl and C2, in two different connections to the same source of emf that has no internal resistance. 由凸 How does the equivalent capacitance for these two cases compare? a It is the same for bath connections. b. It is different for each connection, but one must know the values of C1 and C2, to know which is greater. It is greater for the series connection. It is greater for the parallel connection. It is different for each connection, but one must know the value of E to know which is greater.QUESTION 6 What is the current read by the ammeter in the circuit below? Let R1 = 1 kiloohm, R2 = 2 kiloohm, R3 = 3 kiloohm, and the emf of the ideal source is 5 volts. Input R1, R2, and R3 for resistors R1, R2, and R3 respectively. Input E for the emf E. Use context clues to figure out if you need to input a numerical value, variable, word, etc. All numerical answers should be in three significant figures. R1 R2 R3
- For the circuit below. Hint, use the fact that the change in voltage is equal across all branches in a parallel circuit. ΔV1=ΔV2, R1I1=R2I2 Determine I2. Determine I3. Determine I4. Determine IT.QUESTION 2 Find the expression for the equivalent resistance of 3 resistors (R1,R2.R3) connected in parallel. Sol. In a parallel connection, voltage drops across the resistors so: |=11+ 12 13 Using, Ohm's Law V = we derive, that 1 = V1/ R1 12 = V2/ R2 13=V3/ R3 Since, the voltage is the same on all resistors, then V= V1 = Substituting to the, first equation above, we get the following - vy ]- va |= V1 + V2 V3/ So: 1 1 1 +- +- Rea Reg R1 R2 R3Activity 1- Problem Solving Solve the following problems involving the relationship of current, charges, and time from this equation I=Q/t. Show your complete solution. The compressor on an air conditioner draws 40.0A when it starts up. If the start-up time is 0.50s, calculate the number of charges passing through a cross-sectional area of the circuit in this time?