front 1 Q1 A 100-watt light bulb operating on a 110-volt household circuit has a resistance closest to | back 1 100Ω |
front 2 Q2 The ratio of ∫idt to ∫Edx may be expressed in | back 2 farads |
front 3 Q3 In the circuit shown what is the resistance R given 1A and 2A entering node and 4Ω 6Ω 16V 24V | back 3 4Ω |
front 4 Q4 Five resistors with different lengths and cross-sectional areas made of same material - which has greatest resistance | back 4 longest and narrowest wire |
front 5 Q5 A 12-volt storage battery with internal resistance 2Ω is charged by 2A - voltmeter reads | back 5 16V |
front 6 Q6 Galvanometer with 99Ω deflects full scale at 10⁻³A - to convert to ammeter reading 0.1A connect | back 6 1Ω in parallel |
front 7 Q7 In which of the five circuits with identical batteries is current furnished by battery greatest | back 7 circuit with two resistors in parallel |
front 8 Q8 In which of the five circuits with identical batteries is equivalent resistance greatest | back 8 circuit with two resistors in series |
front 9 Q9 Which of the five circuits with identical batteries dissipates least power | back 9 circuit with two resistors in series |
front 10 Q10 Which graph best represents voltage versus time across resistor R in RC circuit with uncharged capacitor | back 10 starts at maximum and decays exponentially to zero |
front 11 Q11 Which graph best represents current versus time in RC circuit with uncharged capacitor | back 11 starts at maximum and decays exponentially to zero |
front 12 Q12 Which graph best represents voltage across capacitor versus time in RC circuit | back 12 starts at zero and grows as (1 - e^(-t/RC)) |
front 13 Q13 The time constant for discharge could be increased by which of the following | back 13 placing another capacitor in parallel with C |
front 14 Q14 Two resistors same material same length in series where resistor II has greater cross section - which quantity is same for each | back 14 current |
front 15 Q15 EMF of battery is 12V delivers 0.5A and terminal voltage is 10V - internal resistance is | back 15 4Ω |
front 16 Q16 In RC circuit with uncharged capacitor switch closed at t=0 - which is true at t=RC | back 16 current = ε/eR |
front 17 Q17 In circuit with 15V battery 2A and 1A in outside branches and 2Ω in middle branch - potential difference between X and Y is | back 17 8V |
front 18 Q18 Power dissipated in wire carrying current I length l diameter d resistivity ρ - power is directly proportional to | back 18 I and l and d and ρ |
front 19 Q19 In circuit with 0.3Ω and 12V and 6V and 0.2Ω and 1.5Ω with I = 2A - resistance R is | back 19 1Ω |
front 20 Q20 Potential difference between points X and Y in circuit with I = 2A | back 20 8.4V |
front 21 Q21 How much energy is dissipated by 1.5Ω resistor in 60 seconds with I = 2A | back 21 360J |
front 22 Q22 Immediately after switch is closed in RC circuit with battery V and resistors R1 and R2 - current supplied is | back 22 V/R1 |
front 23 Q23 Long time after switch has been closed in RC circuit - current supplied by battery is | back 23 V/(R1+R2) |
front 24 Q24 30Ω and 60Ω connected in parallel to battery of emf 20V and internal resistance r with 0.8A current - value of r is | back 24 5Ω |
front 25 Q25 Variable resistor connected across constant voltage source - which graph represents power dissipated as function of resistance | back 25 P decreases as hyperbola as R increases |
front 26 Q26 If ammeter in circuit reads zero what is resistance R given 1Ω and 2Ω and 3Ω configuration | back 26 6Ω |
front 27 Q27 Resistor R and capacitor C in series with battery terminal voltage V0 - which equation describes circuit | back 27 V0 - Q/C - IR = 0 |
front 28 Q28 Which combination of 4Ω resistors dissipates 24W when connected to 12V battery | back 28 one 4Ω in series with two 4Ω in parallel |
front 29 Q29 Wire of resistance R dissipates power P with current I - replaced by wire with resistance 3R with same current - new power is | back 29 3P |
front 30 Q30 Two identical bulbs in series with battery - switch S closes shorting bulb 2 - what occurs | back 30 bulb 2 goes out and bulb 1 gets brighter |
front 31 Q31 Hair dryer rated 1200W and 120V - effective internal resistance is | back 31 12Ω |
front 32 Q32 Switch open ammeter reads 2.0A in circuit with 15Ω and 20Ω and 60Ω - when switch closed ammeter reading | back 32 2.33A increased slightly but not doubled |
front 33 Q33 Wire X has twice length and twice diameter of wire Y - ratio Rx/Ry is | back 33 1/2 |
front 34 Q34 Two circuits each with 1A but opposite directions and terminal voltages 10V and 20V - values of ε and r are | back 34 ε = 15V and r = 5Ω |
front 35 Q35 Equivalent resistance of three resistors R1 = 35Ω and R2 = 20Ω and R3 = 60Ω in circuit shown | back 35 50Ω |