Physicseasy · Past Paper
An ultrasonic wave has a frequency of 50 kHz. What is its frequency in Hertz?
A50 Hz
B500 Hz
C5,000 Hz
D50,000 Hz
✓ Correct Answer: D — 50,000 Hz
1 kHz = 1000 Hz, so 50 kHz = 50 * 1000 = 50,000 Hz.
Share this question
More from Physics
- What is the magnification (m) of a plane mirror?
- A transformer is 90% efficient. If it consumes 1000W and the output voltage is 100V, what is the output current?
- The displacement of a particle is given by x = (t-2)^2. When is the velocity zero?
- A galvanometer with a resistance of 100 Ohms gives full scale deflection for a current of 1mA. How much series resistance is needed to convert it into a voltmeter of range 0-10V?
- A motor of 100 W works for 1 minute. How much work does it do?