circuit

In the circuit below,

the readings of ammeters A₁, A₂ and A₃ are I₁, I₂ and I₃ respectively.

Which of the following is correct?

• I₁ = I₂ = I₃

• I₁ = I₂ > I₃

• I₁ + I₂ = I₃

• I₁ + I₂ > I₃

• 0.333 A

• 0.75 A

• 1.33 A

• 3 A

• 1.5 A

• 2 A

• 3 A

• 4.5 A

• 1.5 V

• 2 V

• 3 V

• 4.5 V

Four identical lamps are connected as shown.

If the filament in L₃ is burnt, which of the following will happen?

         (1)   L₁ becomes dimmer.

         (2)   L₂ becomes dimmer.

         (3)   L₄ becomes brighter.

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only