2008 | physics-tuition-sg

Evan Toh

Oct 211 min read

When a thermistor is connected in series with a fixed resistor, how to explain the p.d. varies as resistance temperature changes?

When two components are connected in series, where one is a fixed resistor and the resistance of the other can vary (e.g. thermistor,...

Evan Toh

Jan 12 min read

2008PPp1q15,2017PPp1q15– Pressure constant, rate of collision decreases

When gas in piston and heated but pressure remains constant. It is easier to explain in terms of the average force acting on a unit area....

Evan Toh

Dec 31, 20231 min read

Which is better to cool the food? Copper or ice at 0oC - 2008SPP2Q6(b)

Other examples in our daily lives: In some supermarket, the seafood are placed outside of air-conditioned place. The seafood is kept cold...

Evan Toh

Dec 31, 20231 min read

PP2008Q11OR Thermistor in series with fixed resistor, explanation on pd and graph

As both the fixed resistor and the thermistor are connected in series, the sum of potential difference across them will be equal to the...

Evan Toh

Dec 31, 20231 min read

Determine the motion of the particles on transverse wave

Instead of imaging how the particles will move and guess their motion, there is a technique which can help you to determine that. In...