Q: Which symbol represents a fuse in a circuit diagram?

$$\text{A straight line with a rectangle in the middle}$$

Q: Which of the following is NOT a correct symbol-device pair for circuit diagrams?

$$\text{Battery: Zigzag line}$$

Question 1

Which of the following best describes the function of an ammeter in an electrical circuit?

Accepted Answer

It measures the current flowing through a component.

Question 2

A light bulb is connected in series with a battery and a switch. If the switch is open, what is the current through the bulb?

Accepted Answer

Zero.

Question 3

Which symbol represents a fuse in a circuit diagram?

Accepted Answer

$$	ext{A straight line with a rectangle in the middle}$$

Question 4

Conventional current is defined as:

Accepted Answer

The flow of positive charge from positive to negative terminal.

Question 5

A current of $$0.5\,\mathrm{A}$$ flows through a wire for $$20\,\mathrm{s}. $$What is the total charge that passes through the wire?

Accepted Answer

$$40\,\mathrm{C}$$

Question 6

Which of the following statements about electric current is correct?

Accepted Answer

Current is the rate of flow of electric charge.

Question 7

A kettle running on $$230\,\mathrm{V}$$ draws a current of $$4\,\mathrm{A}. $$What is the power consumed by the kettle?

Accepted Answer

$$920\,\mathrm{W}$$

Question 8

If a charge of $$3.00\,\mathrm{C}$$ passes through a light bulb in $$10.0\,\mathrm{s}$$, what is the current through the bulb?

Accepted Answer

$$0.3\,\mathrm{A}$$

Question 9

Which of the following is a correct unit for electric current?

Accepted Answer

$$\mathrm{Ampere}$$

Question 10

A device is connected to a $$12\,\mathrm{V}$$ supply and draws a current of $$1.5\,\mathrm{A}$$ for $$5\,\mathrm{minutes}. $$How much energy is transferred to the device?

Accepted Answer

$$5400\,\mathrm{J}$$

Question 11

Which of the following best explains why the current is the same at all points in a simple series circuit?

Accepted Answer

Because charge is conserved and there is only one path for current to flow.

Question 12

A toaster is rated at $$120\,\mathrm{V}$$ and $$6\,\mathrm{A}. $$What is the power consumed by the toaster?

Accepted Answer

$$720\,\mathrm{W}$$

Question 13

Which of the following is the correct formula for electric current?

Accepted Answer

$$I = \dfrac{q}{t}$$

Question 14

A battery supplies a current of $$2\,\mathrm{A}$$ for $$3\,\mathrm{min}. $$How much charge flows through the circuit?

Accepted Answer

$$360\,\mathrm{C}$$

Question 15

Which of the following statements about alternating current (AC) is correct?

Accepted Answer

AC is used in household power supplies.

Question 16

A $$12\,\mathrm{V}$$ battery is used to power a device for $$10\,\mathrm{min}$$ with a current of $$0.75\,\mathrm{A}. $$What is the total energy transferred?

Accepted Answer

$$5400\,\mathrm{J}$$

Question 17

Which of the following is NOT a correct symbol-device pair for circuit diagrams?

Accepted Answer

$$	ext{Battery: Zigzag line}$$

Question 18

If a current of $$1.75\,\mathrm{A}$$ flows for $$5\,\mathrm{min}$$ through a $$12\,\mathrm{V}$$ heater, what is the total energy transferred?

Accepted Answer

$$63000\,\mathrm{J}$$

Question 19

Which of the following best describes the direction of electron flow in a circuit?

Accepted Answer

From negative to positive terminal.

Question 20

Which of the following is the correct relationship for electrical power in a circuit?

Accepted Answer

$$P = I 	imes V$$

Electric Current and Electrical Circuits: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards