Electricity and Magnets

What is the name of the angle which is marked on the diagram?

• Angle of incidence

• Angle of reflection

• Angle of triangle

• Right angle

What is the angle of incidence?

• 10

• 90

• 80

• 20

The reflection from a ​ smooth surface is called as a ......

Fill in the blanks.

The two types of electrical charges are .............​ and​ ........... ​

• positive, negative

• negative, north

• north, south

• south, positive

Fill in the blanks;

Like charges .......​ , unlike charges .........​ each other.

• repel, attract

• attract, attract

• repel, repel

• attract, repel

A parallel circuit has;

​ ...1... bulbs, ​ ...2... voltage for every bulb, ​ ...3... current, ​ ...4... battery lifetime

• 1. brighter

  2. same

  3. shared

  4. shorter

• 1. dimmer

  2. same

  3. shared

  4. shorter

• 1. brighter

  2. shared

  3. shared

  4. shorter

• 1. brighter

  2. same

  3. shared

  4. longer

A series circuit has;

...1...​ bulbs, ​ ...2... voltage, ​ ...3... current for every bulb, ​ ...4... battery lifetime

• 1. dimmer

  2. shared

  3. same

  4. longer

• 1. brighter

  2. same

  3. shared

  4. shorter

• 1. brighter

  2. same

  3. shared

  4. longer

• 1. brighter

  2. same

  3. same

  4. shorter

Calculate the voltage of a circuit if it has a resistance of 6 ohms and a current of 3A?

• 18V

• 9V

• 2V

• 0.5V

The resistances in a series circuit are 3 ohms, 2 ohm, 8 ohms and 16 ohms. Calculate the total resistance in the circuit?

• 29 Ohms

• 20 Ohms

• 30 Ohms

• 28 Ohms

The elements to make an artificial magnet are ​ 1 , ​2 and ​3 .

• 1. iron

  2. cobalt

  3. nickel

• 1. gold

  2. cobalt

  3. nickel

• 1. iron

  2. copper

  3. nickel

• 1. gold

  2. copper

  3. aluminum