Curriculum
Course: AS Physics 9702
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Curriculum

AS Physics 9702

1. Physical quantities and kinematics

0/41 Dr Dabour Hub Science Diagram and Course Material

2. Dynamics, forces and pressure

0/46 Dr Dabour Hub Science Diagram and Course Material

3. Work, energy, power and deformation

0/31 Dr Dabour Hub Science Diagram and Course Material

4. Waves and superposition

0/39 Dr Dabour Hub Science Diagram and Course Material

5. Electricity and D.C. circuits

0/49 Dr Dabour Hub Science Diagram and Course Material

7. Circular motion and gravitational fields (A Level)

0/25 Dr Dabour Hub Science Diagram and Course Material

8. Thermal physics (A Level)

0/37 Dr Dabour Hub Science Diagram and Course Material

10. Electric fields and capacitance (A Level)

0/36 Dr Dabour Hub Science Diagram and Course Material

11. Magnetic fields and alternating currents (A Level)

0/46 Dr Dabour Hub Science Diagram and Course Material

12. Quantum and nuclear physics (A Level)

0/44 Dr Dabour Hub Science Diagram and Course Material

13. Medical physics and astronomy (A Level)

0/42 Dr Dabour Hub Science Diagram and Course Material
Quiz

24.1.1 The Piezoelectric Transducer – Check yourself

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1.
Ultrasound is a
transverse electromagnetic wave
longitudinal sound wave of frequency above 20 kHz
transverse sound wave
longitudinal wave of frequency below 20 Hz
2.
The inverse piezoelectric effect is when
a p.d. is generated by pressure
light produces a p.d.
heat produces ultrasound
a p.d. makes the crystal change thickness
3.
Why does the transducer include a damping block?
To produce short pulses
To make the crystal vibrate longer
To increase the amplitude
To lower the frequency
4.
An ultrasound of frequency 5.0 MHz travels in tissue at 1500 m s−1. The wavelength is
7.5 mm
3.3 mm
0.30 mm
0.30 m
5.
For resonance in a crystal of thickness t, the wavelength in the crystal is
t/2
t
4t
2t
6.
A pulse returns from a boundary after 40 microseconds in tissue (1500 m s−1). The depth is
3.0 cm
6.0 cm
1.5 cm
12 cm
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