What is the SI unit of electric current?, Volt, Ampere, Watt, Ohm, A 12 V battery is connected to a 4 Ω resistor. What is the current?, 2 A, 4 A, 3 A, 48 A, If the length of a wire is doubled, with material and area unchanged, what happens to the resistance?, Halves, Doubled, Zero, No change, Potential difference between two points is defined as:, Work done per unit charge, Energy per unit time, Charge flowing per unit time, Resistance per unit current, Which of the following does the resistivity of a material primarily depend on?, Only the length of the conductor, Only the cross-sectional area, The nature of the material and its temperature, Only the shape of the conductor, In a series combination, which quantity is the same through every resistor?, Electric potential, Current, Resistance, Voltage, If 20 J of work is done to move 4 C of charge between two points, what is the potential difference?, 16 V, 5 V, 80 V, 8 V, According to Ohm’s law, if voltage increases at constant temperature, current:, Decreases, Reverses, Increases, Stops, Why are household appliances generally connected in parallel?, They all have the same resistance, The current is same everywhere, They have high power supply, They can work independently and receive same voltage supply, Two resistors 2 Ω and 3 Ω are connected in series. Equivalent resistance is:, 5 Ω, 6 Ω, 1.2 Ω, 8 Ω, Two resistors 6 Ω and 3 Ω are connected in parallel. Equivalent resistance is:, 9 Ω, 2 Ω, 6 Ω, 3 Ω, How should an ammeter be connected to measure current through a resistor?, In parallel, Across the battery, In series, Only with the switch, Which component opens or closes a circuit?, Bulb, Ammeter, Switch, Resistor, What is the SI unit of resistivity?, Ω, V/m, Ω m, A, For the same material and length, resistance decreases when:, Current decreases, Voltage increases, Area increases, Length increases, A rheostat is used to:, Measure current, Measure Voltage, Vary resistance, Produce resistance, Which formula relates resistance, resistivity, length, and cross-sectional area of a uniform conductor?, R = ⍴A / l, R = ⍴l / A, R = ⍴Al, R = l / ⍴A, What happens when a circuit is closed?, Current Flows, Current becomes zero, Current does not flow, Resistance becomes zero, A wire has a resistance of 12 Ω. If its length is reduced to half while its cross-sectional area and material remain unchanged, what is its new resistance?, 6Ω, 12Ω, 4Ω, 3Ω, A wire has a resistance of 4 Ω length of 2 m, and cross-sectional area of 0.5 m2 . What is its resistivity?, 8 Ωm, 2 Ωm, 4 Ωm, 1 Ωm

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