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