Solutions: As the fuel level drops, the float which stays on the fuel surface will descend. The rod which is attached to the float will...

Instead of P = IV to explain, it might be easier to explain using P = I^2R when the components are connected in series where current I is...

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

Answer: Option C Focal length f is the distance between the focal point and the centre of the lens (optical centre) . Note that only...

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

An electric cable contains three wires live, neutral and earth. The cable is correctly wired to a plug which contains a 3A fuse. The...

These 2 questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2...

Answer: Option D

Answer: Option C View the videos below to learn how to solve it. There are more than one method. Alternatively, you may put values to...

Answer: Option B Since water will naturally reach 40m high from the bottom of the apartment, you only need to pump the water up by a...

Answer: Option D Key concept here is Newton’s 3rd Law. Action equals reaction. Both trolleys are connected by the spring, hence the...