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Chap 15 Practical Electricity (5105)

Chap 15 Practical Electricity (5105)

Assessment

Presentation

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Physics

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8th - 9th Grade

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Practice Problem

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Easy

Created by

Thou Reaksmey

Used 4+ times

FREE Resource

65 Slides • 6 Questions

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Draw

An LED bulb rated 240 V lights up a room for 30 minutes. Given that a current of 0.04 A flows through the bulb, calculate the energy transferred to the bulb. 

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Multiple Choice

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Which is correct?

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D

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Draw

A cooker has a power of 200 W when connected to a 240 V mains supply. Calculate

(a)the current in the cooker,

(b)the cost of using the cooker for 16 hours. The cost for 1.0 kWh of energy is 25 cents.

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Open Ended

What is the most dangerous thing you have done with electricity?

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Multiple Choice

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What is the answer?

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Multiple Choice

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What is the answer?

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In the event of electrical fault, the earth wire will direct the current in the metal case to the ground and protect user from electric shock

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In the event of electrical fault, the earth wire will stop the current from flowing through the metal case and protects user from electric shock

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In the event of electrical fault, the earth wire will prevent the metal case from overheating by directing the current to the ground

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In the event of electrical fault, the earth wire will prevent the metal case from melting and damage the appliance

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