Current Electricity If the number of valence electrons of an atoms is less than 4,the substance is usually None of the listed here A semiconductor An insulator A conductor None of the listed here A semiconductor An insulator A conductor ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A rheostat differs from potentiometer in the respect that it Offers large number of tapping Has higher wattage rating Has large number of turns Has lower wattage rating Offers large number of tapping Has higher wattage rating Has large number of turns Has lower wattage rating ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will Increases Heater will burn out Decreases Remains same Increases Heater will burn out Decreases Remains same ANSWER DOWNLOAD EXAMIANS APP
Current Electricity An instrument which detects electric current is known as Rheostat Galvanometer Voltmeter Wattmeter Rheostat Galvanometer Voltmeter Wattmeter ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of a straight conductor is independent of Material Temperature Shape of cross-section Cross-sectional area Material Temperature Shape of cross-section Cross-sectional area ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around 1.4 x 10-8 ω-m 1.2 x 10-8 ω-m 1.8 x 10-8 ω-m 1.6 x 10-8 ω-m 1.4 x 10-8 ω-m 1.2 x 10-8 ω-m 1.8 x 10-8 ω-m 1.6 x 10-8 ω-m ANSWER DOWNLOAD EXAMIANS APP
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