Properties of Magnets and Magnetic Fields Quiz

What is the SI unit of magnetic flux named after Wilhelm Eduard Weber?

Weber (Wb)

In a step up transformer, what happens to the output voltage?

It is increased

According to Faraday’s Law of electromagnetic induction, what induces current?

Changing magnetic field

In which direction does the galvanometer needle deflect when a magnet is moved towards the loop?

One direction Signup and view all the answers

What is the significance of electromagnetic induction?

Produces electrical energy using magnetic fields instead of batteries Signup and view all the answers

Which scientist from the text is known for his work on terrestrial magnetism?

Wilhelm Eduard Weber Signup and view all the answers

Which of the following statements about magnetic field lines is true?

Magnetic field lines always form closed loops. Signup and view all the answers

What is the SI unit for measuring magnetic field strength?

Tesla Signup and view all the answers

Which of the following materials are attracted by magnets?

Nickel, cobalt, and iron Signup and view all the answers

What is the name of the Serbian-American inventor known for his work on alternating current and rotating magnetic fields?

Nikola Tesla Signup and view all the answers

What happens to a temporary magnet when the external magnetic field is removed?

It loses its magnetic properties. Signup and view all the answers

What creates a magnetic field?

Moving electric charges Signup and view all the answers

Which of the following is NOT a natural magnet?

U-shaped magnet Signup and view all the answers

What is the force experienced by an object within a magnetic field called?

Magnetic force Signup and view all the answers

What is the relationship between the force of attraction/repulsion between two magnetic poles and the distance between them?

Inversely proportional to the square of the distance Signup and view all the answers

What is the CGS unit for magnetic field strength named after?

Hans Christian Oersted Signup and view all the answers

Which of the following is a property of permanent magnets?

They do not lose their magnetic property even in the absence of an external magnetic field Signup and view all the answers

What is the path followed by magnetic field lines?

They form closed loops Signup and view all the answers

What is a variable in Java?

An identifier that can have changeable values Signup and view all the answers

Which data type is used for whole numbers in Java?

byte Signup and view all the answers

How are constants declared in Java?

With the syntax 'static final = value;' Signup and view all the answers

What is the correct way to declare a 16-bit Unicode character in Java?

'myChar' Signup and view all the answers

Unary operators in Java perform operations with how many operands?

One Signup and view all the answers

How should you declare multiple variables of the same data type in one statement in Java?

Separating each identifier with commas (,) Signup and view all the answers

What is the correct naming convention for a Java identifier composed of multiple words?

Capitalize the first letter of each word Signup and view all the answers

What is the purpose of a Java package?

To group related classes together Signup and view all the answers

Which of the following is a valid type of comment in Java?

C-style comment Signup and view all the answers

What is the difference between a primitive data type and a reference data type in Java?

Primitive data types have a default value of 0, while reference data types have a default value of null Signup and view all the answers

What is the purpose of the `public` access specifier in Java?

To make a class, method, or variable accessible from anywhere in the program Signup and view all the answers

Which of the following is a Java keyword?

Boolean Signup and view all the answers

What is the purpose of Javadoc comments in Java?

To generate HTML documentation for classes, methods, and variables Signup and view all the answers

What was Java initially named before being changed to 'Java' in 1995?

Oak Signup and view all the answers

Which Java edition is suitable for developing software for web applications and enterprise applications?

Java EE Signup and view all the answers

What kind of applications are developed using Java ME?

Mobile gaming applications Signup and view all the answers