Electromagnetism

Question 1

A circuit contains a 15 V battery and a 30 Ω resistor. What is the current in the circuit?

Accepted Answer

0.5 A

Question 2

The equation for power in a circuit element is:

Accepted Answer

P = IV

Question 3

What is a capacitor used for?

Accepted Answer

To store energy that can be released in a quick burst

Question 4

Which of the following statements is true?

Accepted Answer

The voltage is the same for any two objects in parallel

Question 5

A capacitor is connected to a battery. As the voltage across it increases, the current...

Accepted Answer

Decreases

Question 6

What letter is used as the abbreviation for charge?

Accepted Answer

q

Question 7

What is the unit for current?

Accepted Answer

A

Question 8

An ammeter measures:

Accepted Answer

Current

Question 9

Resistors in parallel always have the same:

Accepted Answer

Voltage

Question 10

Which of the following equations is not correct?

Accepted Answer

P = IR

Question 11

What is the name for the equation relating voltage, current, and resistance?

Accepted Answer

Ohm's Law

Question 12

What is current?

Accepted Answer

Rate of flow of charge through a circuit

Question 13

For resistors in series, the equivalent resistance ___________ the individual resistances.

Accepted Answer

is greater than

Question 14

When an uncharged capacitor is first connected to a battery, charge...

Accepted Answer

Flows "through" it

Question 15

What is the current through a 750 Ω resistor connected across a 15 V battery?

Accepted Answer

0.02 A

Question 16

What is the unit for resistance?

Accepted Answer

Ohms

Question 17

What is the abbreviation for the unit of charge?

Accepted Answer

C

Question 18

What is the equivalent resistance of a 70 Ω resistor and a 15 Ω resistor in series?

Accepted Answer

85 Ω

Question 19

What letter is used to stand for current?

Accepted Answer

I

Question 20

What is the equivalent resistance of a 600 Ω resistor and a 1800 Ω resistor in parallel?

Accepted Answer

450 Ω

Question 21

Which of the following best describes resistance?

Accepted Answer

How hard it is for charge to flow in a circuit

Question 22

What does this symbol represent?

Accepted Answer

A capacitor

Question 23

What does this symbol mean?

Accepted Answer

Battery

Question 24

If each end of one element is connected to an end of the other, the elements are said to be in:

Accepted Answer

parallel

Question 25

Who first introduced the concept of electric field?

Accepted Answer

Michael Faraday

Electromagnetism

Questions 25

Electromagnetism

Questions 25