Current Electricity A rheostat differs from potentiometer in the respect that it Offers large number of tapping Has higher wattage rating Has lower wattage rating Has large number of turns Offers large number of tapping Has higher wattage rating Has lower wattage rating Has large number of turns ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With rise in temperature the resistance of pure metals First increases and then decreases Remains constant Decreases Increases First increases and then decreases Remains constant Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Semiconductors have _______temperature co-efficient of resistance. Negative Zero Positive None of the listed here Negative Zero Positive None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Sparking occurs when a load is switched off because the circuit has high Resistance Inductance Impedance Capacitance Resistance Inductance Impedance Capacitance ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of two wires is 25 Ω when connected in series and 6 Ω when joined in parallel. The resistance of each wire is 20 Ω, 30 Ω 5 Ω, 10 Ω 10 Ω, 15 Ω 10 Ω, 20 Ω 20 Ω, 30 Ω 5 Ω, 10 Ω 10 Ω, 15 Ω 10 Ω, 20 Ω ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following quantities remain the same in all parts of a series circuit? Resistance Current Power Voltage Resistance Current Power Voltage ANSWER DOWNLOAD EXAMIANS APP
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