29/03/2020Alternating Currents(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Alternating Currents(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. C A D B2. A direct current of 10A flowing through a heating coil produces a certain power P. What is the new power produced in the same heating coil by a sinusoidal alternating cureent of 10 A peak value? 2P 1/2 P 1/4 P P3. The following shows the variation of voltage with time of a source.The root mean square voltage of the source is 2.8 V 0.50 V 7.0 V 1.7 V4. A voltmeter reads 88 V when connected across the terminals of a sinusoidal power source with frequency 888 Hz. The equation for the instantaneous voltage (in volts) provided by the source can be given as 125 sin 5580 t 125 sin 888 t 88 sin 5580 t 88 sin 888 t5. Electrical power of 1.0 MW from a substation is to be transmitted at 66 kV r.m.s via a 5.0 km long cable to a factory. If the cable resistance is 1.0 ohm per kilometer, what is the power loss in the transmission cable ? 1150 W 230 W 460 W 1360 W6 out of 5Time is Up!