A coil of resistance 16 Ω is placed with its plane perpendicular to a uniform magnetic field whose flux (φ in 10-3 Weber) changes with time (t in seconds) as: φ = 5t2 + 4t + 2 The induced current at time t = 6 seconds is:

A step-down transformer connected to an AC mains supply of 220 V operates an 11 V, 44 W lamp. Ignoring power losses, what is the current in the primary circuit?

A transformer has 200 turns in its primary winding and 1000 turns in its secondary winding. What type of transformer is this?