Multiple Choice Quiz: Passive Components

The values available in the E6 series are:

(a) 1.0, 1.5, 2.2, 3.3, 4.7, 6.8
(b) 1.0, 2.2, 3.3, 4.7, 6.8, 8.2
(c) 1.0, 2.2, 3.3, 5.6, 6.8, 8.2

The resistance of a light dependent resistor:

(a) falls with increasing light level
(b) increases with increasing light level
(c) remains constant irrespective of light level

Two capacitors, each of 220 µF, are connected in parallel. The capacitance of the combination will be:

(a) 110µF
(b) 220µF
(c) 440µF

If the resistance of a material falls with increasing temperature it is said to have:

(a) negative temperature coefficient
(b) positive temperature coefficient
(c) zero temperature coefficient

The circuit symbol shown is a:

(a) fixed resistor
(b) preset resistor
(c) variable resistor

Two capacitors, each of 15 µF, are connected in series. The capacitance of the combination will be:

(a) 7.5µF
(b) 15µF
(c) 30µF

The fourth band of a four band resistor is marked in silver. This indicates a tolerance of:

(a) 5%
(b) 10%
(c) 20%

The charge, Q, present in a capacitor is given by the relationship:

(a) Q = C / V
(b) Q = C V
(c) Q = ½ C V²

The primary and secondary voltages present in a loss-free transformer are 240 V and 12 V respectively. If the secondary is connected to a 6 Ω resistor, which one of the following gives the primary current?

(a) 100 mA
(b) 200 mA
(c) 2 A

A graph of flux linkage, NΦ, plotted against current, I, for an inductor will take the form of:

(a) a curve that rises rapidly
(b) a curve that falls rapidly
(c) a straight line

The third band of a four band resistor is marked in black. This indicates a multiplier of:

(a) 1
(b) 10
(c) 100

Two inductors, each of 6.8 mH, are connected in parallel. The inductance of the combination will be:

(a) 3.4 mH
(b) 6.8 mH
(c) 13.6 mH

A loss-free transformer has 1200 primary turns and 300 secondary turns. If the primary winding is connected to a 200 V AC supply which one of the following gives the secondary voltage:

(a) 50 V
(b) 100 V
(c) 800 V

A 100 nF capacitor has a tolerance of ±5%. The maximum possible value for this component will be:

(a) 95 nF (b) 105 nF (c) 110 nF

Which one of the following statements is TRUE?

(a) The windings in a transformer are linked by the voltage that is applied to the transformer's core
(b) The windings in a transformer are linked by the current that flows in the transformer's core
(c) The windings in a transformer are linked by the magnetic flux that appears in the transformer's core

The resistance of a light dependent resistor:

(a) falls with increasing light level
(b) increases with increasing light level
(c) remains constant irrespective of light level

An inductor of 100 mH has a tolerance of ±20%. The maximum possible value for this component will be:

(a) 80 mH
(b) 110 mH
(c) 120 mH

Two resistors, each of 15 Ω, are connected in series. The resistance of the combination will be:

(a) 7.5Ω
(b) 15Ω
(c) 30Ω

A graph of charge, Q, plotted against voltage, V, for a capacitor will take the form of:

(a) a curve that rises rapidly
(b) a curve that falls rapidly
(c) a straight line.

The third band of a four band resistor is marked in orange. This indicates a multiplier of:

(a) 1,000
(b) 10,000
(c) 100,000

Two resistors, each of 220 Ω, are connected in parallel. The resistance of the combination will be:

(a) 110Ω (b) 220Ω (c) 440Ω

What numeric value is indicated by a red band in the resistor colour code?

(a) 1
(b) 2
(c) 3

A resistor is marked with the following coloured bands:

Red, Red, Red, Gold

The value of the resistor will be:

(a) 222 Ω 5%
(b) 2.2 kΩ 5%
(c) 22.2 kΩ 5%

In a loss-free transformer:

(a) the primary and secondary powers will be the same
(b) the secondary power will be greater than the primary power
(c) the primary power will be greater than the secondary power

Two inductors, each of 22 mH, are connected in series. The inductance of the combination will be:

(a) 11 mH
(b) 22 mH
(c) 44 mH