The magnetic relay is a device used for?
A. timing in sports B. storing magnetic field C. read the magnitude of magnetic flux D. controlling another circuit carrying larger current Correct Answer: Option D D. controlling another circuit carrying larger currentA 120Ω resistor dissipates 8 kJ of heat in 20s. Calculate the current through the resistor.
A. 5.8A B. 6.9A C. 30.0A D. 33.3A Correct Answer: Option A A. 5.8ATwo similar cells are used to light two similar lamps as illustrated in the diagrams above. In which of the circuit diagrams are the lamps brightest?
A. P B. Q C. R D. S Correct Answer: Option A A. PSix dry cells each of e.m.f. 2.0 and internal resistance of 1.0Ω are connected in parallel across a load of 3.0Ω. Calculate the effective current in the circuit
A. 0.63A B. 0.50A C. 0.31A D. .22A Correct Answer: Option A A. 0.63AProducts
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