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WorksheetsQuiz on Current Electricity
Total questions: 24
Worksheet time: 12mins
What is the SI unit of current?
Coulomb (C)
Ampere (A)
Ohm (Ω)
Volt (V)
What does the term 'potential difference' refer to?
Work done per unit charge
Charge per unit time
Resistance per unit length
Current per unit voltage
According to Ohm's law, what is the relationship between current and potential difference?
Inversely proportional
Directly proportional
Independent
Exponential
What is the resistance of a conductor directly proportional to?
Area of cross-section
Length of the conductor
Temperature
Voltage
What is the term for the resistance offered by the electrolyte inside a cell?
Terminal resistance
Internal resistance
External resistance
Electromotive resistance
What is the unit of resistivity?
Ohm-metre (Ω m)
Ohm (Ω)
Siemen (S)
Volt (V)
What type of resistors obey Ohm's law?
Non-ohmic resistors
Superconductors
Ohmic resistors
Variable resistors
What happens to the resistance of a conductor as its temperature increases?
Decreases
Becomes zero
Increases
Remains the same
What is the formula for calculating potential difference?
V = IR
V = W/Q
V = Q/W
V = I/R
What is the relationship between current and resistance in a circuit?
Current is inversely proportional to resistance
Current is directly proportional to resistance
Current is independent of resistance
Current is exponentially related to resistance
What is the term for the flow of charge in a circuit?
Resistance
Current
Voltage
Power
What is the effect of increasing the length of a conductor on its resistance?
Increases resistance
Decreases resistance
No effect
Doubles resistance
What is the term for the work done per unit charge in a circuit?
Power
Resistance
Voltage
Current
What is the formula for calculating the total resistance of resistors in series?
R = R1 + R2 + R3
R = 1/(1/R1 + 1/R2)
R = R1 * R2
R = R1 - R2
What is the potential difference across resistors in parallel?
Same across all
Depends on current
Different for each
Zero
What is the term for the reciprocal of resistance?
Conductance
Resistivity
Voltage
Current
What is the effect of increasing the area of cross-section of a conductor on its resistance?
Doubles resistance
No effect
Decreases resistance
Increases resistance
What is the term for a substance with zero resistance at very low temperatures?
Conductor
Superconductor
Insulator
Resistor
What is the relationship between terminal voltage and electromotive force (emf) when current is drawn from a cell?
Terminal voltage is independent of emf
Terminal voltage equals emf
Terminal voltage is less than emf
Terminal voltage is greater than emf
What is the unit of conductance?
Coulomb (C)
Volt (V)
Siemen (S)
Ohm (Ω)
What happens to the terminal voltage when a larger current is drawn from a cell?
Becomes zero
Remains the same
Decreases
Increases
What is the formula for calculating the total resistance of resistors in parallel?
1/R = 1/R1 + 1/R2
R = R1 * R2
R = R1 - R2
R = R1 + R2 + R3
What is the term for the work done in bringing a unit positive charge from infinity to a point?
Voltage
Resistance
Potential
Current
What is the effect of the nature of the conductor on its resistance?
Depends on material
Inversely proportional
Depends on temperature
No effect
