Electricity and Magnetism

Free sample questions

Electricity and Magnetism — sample Science questions with answers

1. Question 1

   What type of charge is present on an object that has been rubbed with a silk cloth?

   • APositive charge
   • BNegative charge
   • CNeutral charge
   • DDouble charge

   Answer: A. Positive charge

   When glass is rubbed with a silk cloth, electrons from the glass transfer to the silk, causing the glass to lack electrons and become positively charged.

2. Question 2

   Which of the following is a good conductor of electricity?

   • APlastic
   • BRubber
   • CCopper
   • DGlass

   Answer: C. Copper

   Copper is a metal that has free electrons to conduct electric current, while plastic, rubber, and glass are insulators.

3. Question 3

   In a parallel circuit, when one bulb burns out, the other bulbs will...

   • AGo out
   • BLight up dimmer
   • CLight up brighter
   • DContinue to light normally

   Answer: D. Continue to light normally

   In a parallel circuit, each branch has its own path. The other bulbs still receive full voltage and continue to light.

4. Question 4

   The unit of electric current is...

   • AVolt (V)
   • BAmpere (A)
   • COhm (Ω)
   • DWatt (W)

   Answer: B. Ampere (A)

   Electric current is measured in Amperes (A). Volt for potential difference, Ohm for resistance, Watt for power.

5. Question 5

   What is the function of a fuse in a household electrical circuit?

   • AReduce voltage
   • BStore electrical energy
   • CBreak the circuit if current is excessive
   • DIncrease resistance

   Answer: C. Break the circuit if current is excessive

   A fuse is a safety device that will blow when the current exceeds its rated value, protecting the circuit from damage due to overcurrent.