Current electricity

[amp_mcq option1=”Semiconductor” option2=”Super-conductor” option3=”Compound” option4=”Insulator” correct=”option3″]

Detailed SolutionA substance whose molecules consist of dissimilar atoms is called

[amp_mcq option1=”Varistors” option2=”Thermistor” option3=”Semiconductors” option4=”Variable resistors” correct=”option3″]

Detailed SolutionAre the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

[amp_mcq option1=”ohms/°C” option2=”mhos/ohm°C” option3=”ohms/ohm°C” option4=”mhos/°C” correct=”option1″]

Detailed SolutionTemperature coefficient of resistance is expressed in terms of

[amp_mcq option1=”A galvanometer with low resistance in parallel is a voltmeter” option2=”A galvanometer with high resistance in parallel is a voltmeter” option3=”A galvanometer with low resistance in series is an ammeter” option4=”A galvanometer with high resistance in series is an ammeter” correct=”option1″]

Detailed SolutionWhich of the following statement is true?

[amp_mcq option1=”2 watts” option2=”4 watts” option3=”6 watts” option4=”8 watts” correct=”option2″]

Detailed SolutionA 3 ohm resistor having 2 A current will dissipate the power of

[amp_mcq option1=”reactance” option2=”capacitance” option3=”impedance” option4=”resistance” correct=”option4″]

Detailed SolutionHeat in a conductor is produced on the passage of electric current due to

[amp_mcq option1=”9 times” option2=”$$\frac{1}{9}$$ times” option3=”$$\frac{1}{3}$$ times” option4=”3 times” correct=”option3″]

Detailed SolutionThree identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be

[amp_mcq option1=”Henry” option2=”Coulomb” option3=”Watt” option4=”Watt-hour” correct=”option3″]

Detailed SolutionThe S.I. unit of power is

[amp_mcq option1=”Conductance” option2=”Resistance” option3=”Reluctance” option4=”Thermal conductivity” correct=”option1″]

Detailed SolutionAll good conductors have high

[amp_mcq option1=”A semiconductor is a material whose conductivity is same as between that of a conductor and an insulator” option2=”A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator” option3=”A semiconductor is one which conducts only half of the applied voltage” option4=”A semiconductor is a material made of alternate layers of conducting material and insulator” correct=”option1″]

Detailed SolutionWhich of the following statement is correct?