DC Circuits

A current flows in two resistors connected in series as shown in the diagram. A₁ and A₂ are the readings on the ammeters. V₁ and V₂ are the readings on the voltmeters.

Which of the following correctly describes the ammeter and voltmeter readings?

Ammeter readings Voltmeter readings

• A₁ is less than A₂ V₁ is less than V₂

• A₁ is less than A₂ V₁ is greater than V₂

• A₁ is equal to A₂ V₁ is less than V₂

• A₁ is equal to A₂ V₁ is equal to V₂

Which two resistor combinations have the same resistance between X and Y?

• P and Q

• P and S

• Q and R

• R and S

What is the effective resistance of the three resistors in the circuit shown below?

• 0.3 Ω

• 1.1 Ω

• 3 Ω

• 12 Ω

What is the effective resistance of the four resistors in the circuit shown below?

• 0.25 Ω

• 4 Ω

• 6 Ω

• 18 Ω

The current of 6 A flows in the circuit shown. It splits up when it enters parallel branches of resistors.

What is the reading on the ammeter?

• 2 A

• 3 A

• 6 A

• 12 A

As shown in the diagram below, the ammeter reads 1A.

What is the e.m.f of the cell?

• 14 V

• 19 V

• 20 V

• 22 V

A cell is connected in series with an ammeter and a lamp. The current is 1.0 A.

In which circuit, using identical cells, lamps and ammeters, is the current reading 2.0 A?

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