# Electric Charges. Conductors and Insulators Practice Questions

The following physics revision questions are provided in support of the physics tutorial on Electric Charges. Conductors and Insulators. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Electric Charges. Conductors and Insulators tutorials. The Electric Charges. Conductors and Insulators calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Electrostatics Learning Material
Tutorial IDTitleTutorialVideo
Tutorial
Revision
Notes
Revision
Questions
14.1Electric Charges. Conductors and Insulators

## Physics Revision Questions for Electric Charges. Conductors and Insulators

1) Two identical objects are charged with the values shown in the figure.

What is the final charge in both objects after placing them in contact?

1. +2 C
2. -2 C
3. -7 C
4. -14 C
5. +14 C

2) When a negatively charged object touches the leaves of a charged electroscope A, the leaves close, while when the same object is brought near another charged electroscope B, the leaves open more. What were the original charges of electroscopes A and B?

1. Electroscope A was positive while electroscope B was negative
2. Electroscope A was negative while electroscope B was positive
3. Both electroscopes were negative
4. Both electroscopes were positive
5. Electroscope A was negative while electroscope B was neutral

3) A charged object contains 5.0 billion free electrons. What is its electric charge in Coulombs?

1. 1.6 × 10-9 C
2. 1.6 × 10-1°C
3. 5.0 × 10-1°C
4. 8.0 × 10-1°C

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