Advanced Qualification · A-003 Measurements · A-003-002-004
The formula to be used to calculate the power output of a transmitter into a resistor load using a voltmeter is:
- AP = EI cos 0
- BP = IR
- CP = (E exponent 2) /R
- DP = EI/R
Correct answer: C — P = (E exponent 2) /R. From the official ISED question bank, verified word for word.
Why
To find power when you only know voltage and resistance, you must square the voltage reading and divide it by the resistance value. The full explanation — and one for every question — is in Pro.
Practise this section
Measurements is section A-003 of the Advanced exam: Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.
Drill A-003 — free, no account