Question 1

Which of the following best describes the direction of electron flow in a metallic conductor when a potential difference is applied?

Accepted Answer

Electrons flow from the end of higher potential to the end of lower potential.

Question 2

What is the mathematical expression for electric current $$I in $$terms of charge $$Q$$ and time $$t$$?

Accepted Answer

$$I = Q \div t$$

Question 3

A wire carries a current of $$2\ \mathrm{A}$$ for $$5\ \mathrm{s}. $$How much charge passes through the wire in this time?

Accepted Answer

$$10\ \mathrm{C}$$

Question 4

Which of the following is NOT an effect produced by an electric current flowing through a substance?

Accepted Answer

Gravitational effect

Question 5

If a conductor has a large number of free electrons, what property does it exhibit?

Accepted Answer

It allows electric current to flow easily.

Question 6

Which equation correctly represents the force $$F$$ experienced by an electron in an electric field $$E$$?

Accepted Answer

$$F = eE$$

Question 7

A current of $$0.5\ \mathrm{A}$$ flows through a conductor for $$20\ \mathrm{s}. $$Calculate the total charge transferred.

Accepted Answer

$$10\ \mathrm{C}$$

Question 8

Which statement best explains why stationary electric charges and magnetic fields do not affect each other?

Accepted Answer

Magnetic fields only interact with moving charges, not stationary ones.

Question 9

In a practical scenario, which of the following is a real-life application of the magnetic effect of electric current?

Accepted Answer

Operation of an electric motor

Question 10

If $$3\ \mathrm{C} of $$charge passes through a cross-sectional area of a conductor in $$1.5\ \mathrm{s}$$, what is the current?

Accepted Answer

$$2\ \mathrm{A}$$

Question 11

Which of the following best describes the relationship between electric and magnetic phenomena?

Accepted Answer

They are related and can have mutual effects when charges are moving.

Question 12

A student connects a battery to a copper wire. What causes the electrons to move through the wire?

Accepted Answer

The electric field established by the potential difference across the wire.

Question 13

Which of the following is the correct definition of electric current?

Accepted Answer

The rate of flow of electric charge through a cross-sectional area of a conductor.

Question 14

A hospital uses an MRI machine that relies on the magnetic effect of electric current. Which principle is being applied?

Accepted Answer

Moving electric charges produce magnetic fields.

Question 15

If the electric potential at point A is $$12\ \mathrm{V}$$ and at point B is $$5\ \mathrm{V}$$, in which direction will electrons flow in a conductor connecting these points?

Accepted Answer

From point B to point A

Question 16

Which of the following scenarios demonstrates the chemical effect of electric current?

Accepted Answer

Electroplating of metals in an industrial process

Question 17

A conductor has a current of $$3\ \mathrm{A}. $$How much charge passes through it in $$4\ \mathrm{s}$$?

Accepted Answer

$$12\ \mathrm{C}$$

Question 18

Which of the following is a correct statement about conductors?

Accepted Answer

They contain a large number of free electrons.

Question 19

A student observes that a wire gets warm when current flows through it. Which effect of electric current is responsible for this?

Accepted Answer

Heating effect

Question 20

Which formula would you use to calculate the current if you know the charge and the time interval?

Accepted Answer

$$I = \frac{Q}{t}$$

Electric Current and Magnetic Effects: Study Notes for Grade 11 Physics

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