Examlex
An AC voltage source,with a peak output of 200 V,is connected to a 25-Ω resistor.What is the effective (or rms) current in the circuit?
Q1: Two thin lenses with focal lengths 23.0
Q1: A converging lens with two convex surfaces
Q13: Square coil A has 2N turns and
Q30: When an electromagnet has an iron core
Q36: How much charge can be placed on
Q49: When the reflection of an object is
Q64: Helium-neon laser light has a wavelength in
Q65: Changing the f-number of a camera by
Q67: If I = 2.0 mA and the
Q84: In an AC series circuit,the current in