F2 Science Electricity Exercise Top //free\\

If a current of 0.025 A flows through a car bulb with a resistance of 480 Ω, what is the voltage of the accumulator it is connected to?

What will happen if this charged plastic rod is brought near a stream of neutral tap water? Explain your answer. Exercise 2: Ohm's Law Calculation

If one bulb blows, others stay lit (this is why houses are wired in parallel!). f2 science electricity exercise top

A) Rubber B) Plastic C) Copper D) Wood

1Rtotal=1R1+1R2the fraction with numerator 1 and denominator cap R sub t o t a l end-sub end-fraction equals the fraction with numerator 1 and denominator cap R sub 1 end-fraction plus the fraction with numerator 1 and denominator cap R sub 2 end-fraction If a current of 0

C) So that switching off one appliance does not turn off the others. D) To reduce the total voltage used by the house. Answer: C Section B: Structured & Calculation Questions

Use this Electricity Formula Sheet to practice rearranging for different unknowns: To find Current: To find Resistance: 2. Series vs. Parallel Circuits Exercise 2: Ohm's Law Calculation If one bulb

A) —o— B) —∣∣— C) —///— D) —M—

is the flow of electrons. It is measured in amperes (A) . Voltage (V) is the driving force that pushes current through a circuit, measured in volts (V) . Higher voltage increases the current flow if the resistance stays constant.

Thinner wires have higher resistance than thicker ones. 2. Comparing Series and Parallel Circuits

(higher temperatures generally increase resistance). Question 2: Home Electrical Safety