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Which law states that the current flowing through a conductor is directly proportional to the voltage across it?

The pitch of a sound is primarily determined by which of the following?

In an AC circuit, voltage and current are given by V = 200 sin(ωt) and I = 10 sin(ωt + π/3). What is the average power consumed?

A person throws a ball from ground level at speed u and angle θ. The ball reaches maximum height H and range R. What is the ratio H/R?

Two capacitors of 6 µF and 3 µF are connected in series and a potential difference of 90 V is applied. The energy stored in the system is:

Which physical quantity remains constant during uniform circular motion?  

The stress–strain graph for two wires A and B is shown. Wire A has a steeper linear region than B. This indicates that:

An ant can see objects all around it due to the presence of which type of eyes?

Why does a large fire in the open appear to be fanned by strong winds?