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WorksheetsSemiconductors
Total questions: 15
Worksheet time: 33mins
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
diode
semiconductor
conductor
insulator
superconductor
The characteristics of p-type semiconductors is includes
Majority carriers are electron
Has tendency to gain electron
Has tendency to donor electron
Easy to conduct electricity
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
An n type semiconductor is negatively charged
True
False
which statement is correct? (the dark circles represent the electrons)
p-type of the diode is connected to the negative terminal.
Electron moves across the p-n junction, makes the diode forward biased
current will not flow in the circuit
reverse biased circuit
The voltage across an LED is 1.5 V when it is in a circuit with 9 V battery and a 225 Ω resistor. What is the current through the resistor?
6.7 mA
33 mA
40 mA
47 mA
Solar (or PV) cells are made of many individuals cell stacked together, and these are made of materials called ______________.
diodes
electrometals
semiconductors
solarductors
The power dissipated in a 120Ω resistor is 4·8 W. The current in the resistor is
0·020 A
0·040 A
0·20 A
25 A
A 24·0 μF capacitor is charged until the potential difference across it is 125 V. The charge stored on the capacitor is
5·21 × 106 C
7·75 × 10-2 C
1·50 × 10-3 C
3·00 × 10-3 C
A student makes the following statements about uncertainties.
I All measurements of physical quantities are liable to uncertainties.
II Random uncertainties occur when a measurement is repeated and slight variations occur.
III Systematic uncertainties in a quantity occur when measurements are either all smaller or all larger than the true value of the quantity.
Which of these statements is/are correct?
I only
I and II only
II and III only
I, II and III
A 20 µF capacitor is connected to a 12 V d.c. supply. The maximum charge stored on the capacitor is
1·4 × 10-3 C
2·4 × 10-4 C
1·4 × 10-4 C
1·7 × 10-6 C
A student makes the following statements about conductors, insulators and semiconductors.
I In conductors, the conduction band is completely filled with electrons.
II In insulators, the gap between the valence band and the conduction band is large.
III In semiconductors, increasing the temperature increases the conductivity.
Which of these statements is/are correct?
I only
III only
I and II only
II and III only
A student makes the following statements about energy bands in different materials.
I In metals the highest occupied energy band is not completely full.
II In insulators the highest occupied energy band is full.
III The gap between the valence band and conduction band is smaller in semiconductors than in insulators.
Which of these statements is/are correct?
II only
I and II only
I and III only
I, II and III
