Current Electricity The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is Positive Zero Negative About 2 ohms per degree Positive Zero Negative About 2 ohms per degree 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 Heater will burn out Decreases Increases Remains same Heater will burn out Decreases Increases Remains same ANSWER DOWNLOAD EXAMIANS APP
Current Electricity In the case of direct current Magnitude of current changes with time Magnitude of current remains constant Magnitude and direction of current changes with time Magnitude and direction of current remains constant Magnitude of current changes with time Magnitude of current remains constant Magnitude and direction of current changes with time Magnitude and direction of current remains constant ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The substances which have a large number of free electrons and offer a low resistance are called Conductors Inductors Insulators Semi-conductors Conductors Inductors Insulators Semi-conductors ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With rise in temperature the resistance of pure metals Decreases First increases and then decreases Increases Remains constant Decreases First increases and then decreases Increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The maximum current rating for a 10 kΩ, 0.5 W resistor is 0.707 mA 28.28 mA 14.14 mA 7.07 mA 0.707 mA 28.28 mA 14.14 mA 7.07 mA ANSWER DOWNLOAD EXAMIANS APP
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