Electrical Circuit Quiz 2

Which row gives the unit of the quantity measured by X and the unit of the quantity measured by Y?

• X: Ampere || Y: Ampere

• X: Ampere || Y: Volt

• X: Volt || Y: Ampere

• X: Volt || Y: Volt

Which ammeter has the largest reading?

• X

• Y

• Z

• They all have the same reading.

The diagram shows part of a circuit used to switch street lamps on and off automatically.

In the evening it gets dark. Which row shows the effect on the resistance of the light-dependent resistor (LDR) and on the potential difference (p.d.) across it?

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Two meters are connected in a circuit to measure the current in a component and the potential

difference across the component. Which meters are used and how are they connected to the component?

• an ammeter in parallel for current, a voltmeter in series for potential difference

• an ammeter in series for current, a voltmeter in parallel for potential difference

• a voltmeter in parallel for current, an ammeter in series for potential difference

• a voltmeter in series for current, an ammeter in parallel for potential difference

The diagram shows two resistors connected in a circuit. What could be the combined resistance of this arrangement of resistors?

• 4.0 Ω

• 6.0 Ω

• 9.0 Ω

• 18 Ω

Why are lamps in a house lighting circuit connected in parallel rather than in series?

• If one lamp stops working, the remaining lamps become brighter.

• Less current is taken from the power supply.

• The lamps can be turned off independently using switches.

• When more lamps are added, their brightness decreases.

Which row correctly compares I2 and I3 with I1?

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Which produces an electromotive force (e.m.f.)?

• a battery

• a filament lamp

• a resistor

• a spring balance

What is the total resistance between points P and Q?

• less than 40 Ω

• 50 Ω

• between 60 Ω and 100 Ω

• 100 Ω

A circuit is set up to determine the resistance of a resistor R. The meter readings are 2.0A and

3.0V. What is the resistance of the resistor R?

• 0.67 Ω

• 1.5 Ω

• 5.0 Ω

• 6.0 Ω