Question

Assume that a radio station is about $200$ km away from your location and the station operates at $972$ kHz. How long does it take for an electromagnetic signal to travel from the station to you and how many wave crests does it send out per second

• A. $666$ $\mu$s and $9.72 \times 10^5$ crests per second
• B. $666$ $\mu$s and $972 \times 10^5$ crests per second
• C. $555$ $\mu$s and $97.2 \times 10^7$ crests per second
• D. $555$ $\mu$s and $0.972 \times 10^5$ crests per second
• E. $444$ $\mu$s and $9 \times 10^6$ crests per second

Hint:

Frequency directly gives number of crests per second.

Answer 1

The Correct Option is A