An acoustic sonar transducer is driven by a sinusoidal alternating current (ac) voltage supply. The supply provides an output with a peak voltage of 36 V36\text{ V}36 V.
Calculate the root-mean-square (rms) voltage of the supply.
To verify the waveform, an oscilloscope is connected across the transducer. The trace on the screen shows a peak height corresponding to exactly 3.03.03.0 grid divisions above the central axis. Determine the yyy-voltage gain setting of the oscilloscope in V div−1\text{V div}^{-1}V div−1.
The ac supply is then replaced by a square-wave generator to test the transducer's impulse response. A new trace is obtained on the oscilloscope with the same yyy-voltage gain. A single complete cycle of this square wave is observed to span exactly 5.05.05.0 horizontal grid divisions. The time-base of the oscilloscope is set to 4.0×10−6 s div−14.0 \times 10^{-6}\text{ s div}^{-1}4.0×10−6 s div−1. Calculate the frequency of the square-wave signal.
66 exam-style questions on AQA A Level Physics Magnetic fields (A-level only), covering Magnetic flux density (A-level only), Moving charges in a magnetic field (A-level only), Magnetic flux and flux linkage (A-level only), Electromagnetic induction (A-level only), Alternating currents (A-level only), and The operation of a transformer (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.