F2 Science Electricity Exercise Top Access
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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
Materials (like plastic or rubber) that do not allow electricity to flow because they hold their electrons tightly . Part B: Measurement and Symbols Symbol Hint Ammeter Measures electric current; connected in series . A circle with an 'A'. Voltmeter
A) V = I + R B) V = I × R C) V = R / I D) V = I – R f2 science electricity exercise top
Study the given electrical circuit. If the switch is closed, will the bulb glow? Motivate your answer.
Why are heating coils made of alloys (like nichrome) instead of pure metals? Alloys have higher resistivity and melting points. If a motor takes line, what is its power?
You cannot solve circuit problems without understanding the relationship between these three. Are you preparing for a or a structured written exam
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): In a parallel circuit, the voltage across each branch is equal to the source voltage (
To truly master this subject, follow these proven strategies: Answer: C Section B: Structured & Calculation Questions
What happens to the total resistance in a series circuit if more light bulbs are added? A. It decreases. B. It remains the same. C. It increases. D. It becomes zero. Which material is commonly used as an electrical insulator? A. Copper. B. Silver. C. Graphite. D. Plastic. Part B: Short Answer & Calculations Ohm's Law Calculation If a circuit has a voltage of and a resistor of , what is the current flowing through the circuit? Circuit Diagrams Define the difference between a Series Circuit Parallel Circuit in terms of current flow.
| | Insulators | |---|---| | Allow electricity to flow easily | Do not allow electricity to flow easily | | Have low resistance | Have high resistance | | Examples: Copper, Aluminum, Iron | Examples: Rubber, Wood, Plastic |
Two identical bulbs are connected in parallel. If one bulb burns out, what happens to the other bulb? A) It goes out because the circuit is broken. B) It stays lit and becomes dimmer. C) It stays lit with the same brightness. D) It blinks rapidly. ✍️ Part 2: Structured Calculation Exercises Exercise 1: Analyzing a Series Circuit Two resistors, , are connected in series to a the effective (total) resistance of the circuit. Find the total current flowing through the circuit. Determine the voltage drop across the Answer Key & Step-by-Step Solution: Total Resistance ( Rjcap R sub j ): Rj=R1+R2cap R sub j equals cap R sub 1 plus cap R sub 2