Physics Past Questions and Answers

The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be

In the above circuit diagrams A is the ammeter and V is the Voltmeter. Which of the circuits is correct for finding the correct value of the resistance R

Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

The total power drawn from the cell in the circuit above is

The fig above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth's magnetic field, the compass needle will