A current carrying straight wire passes inside a triangular loop as shown in figure. The current in the wire is perpendicular to paper inwards. Find the direction of the induced current in the loop if current in the wire is increased.

Magnetic field lines round the current carrying wire as shown in figure. Since, the lines are tangential to the loop $\left(\theta =90°\right)$ the flux passing through the loop is always zero, whether the current is increases or decreased. Hence, change in flux is also zero. Therefore, induced current in the loop will be zero.