Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

B.5.12 Variable Resistance – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
A 6.0 V supply is across 2.0 kΩ and 4.0 kΩ resistors in series. The p.d. across the 4.0 kΩ resistor is
2.0 V
4.0 V
3.0 V
6.0 V
2.
An LDR is in series with a fixed resistor, and the output is across the LDR. As the light level increases, the output p.d.
increases
decreases
stays the same
becomes the supply p.d.
3.
The advantage of a potentiometer over a rheostat for supplying a component is that it
allows the p.d. to be varied from zero
uses less power
has a higher resistance
is cheaper
4.
A load is connected across the output of a divider. The output p.d.
increases
is unchanged
doubles
decreases
5.
A divider has Vin = 5.0 V, with 1.0 kΩ at the top and 4.0 kΩ at the bottom. Vout across the bottom is
1.0 V
2.5 V
4.0 V
5.0 V
6.
To make the output of a thermistor divider rise when heated, with an NTC thermistor you should take the output across the
thermistor
supply
ammeter
fixed resistor
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Part of Theme B — The Particulate Nature of Matter — see every lesson and quiz in this unit.
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