Question 11 MarkCharging is a process of reproducing ……………….AnswerActive materials.View full question & answer→
Question 21 Mark………………. first introduced the electrochemical batteryAnswerVolta.View full question & answer→
Question 31 MarkAn instrument to measure electrical power consumed is ……………….AnswerWattmeter.View full question & answer→
Question 51 Mark………………. is an instrument to measure the potential difference.AnswerPotentiometer.View full question & answer→
Question 61 MarkThe temperature coefficient of manganin wire is ……………….AnswerLow.View full question & answer→
Question 71 Mark………………. is a form of Wheatstone’s bridge.AnswerMetre bridge.View full question & answer→
Question 81 MarkWheatstone bridge is an application of ……………….AnswerKirchhoff’s Law.View full question & answer→
Question 91 MarkKirchhoff’s second law is a consequence of conservation of ……………….AnswerEnergy.View full question & answer→
Question 111 MarkCurrent law is a consequence of conservation of ……………….AnswerCharges.View full question & answer→
Question 121 MarkThe current law states that the algebraic sum of the currents meeting at any junction in a circuit is ……………….AnswerZero.View full question & answer→
Question 141 MarkA freshly prepared cell has ………………. internal resistance.AnswerLow.View full question & answer→
Question 151 MarkIn the electrolyte of the cell, current flows from ……………….AnswerNegative to the positive terminal.View full question & answer→
Question 161 MarkThe electric current in an external circuit flows from the ……………….AnswerPositive to the negative terminal.View full question & answer→
Question 171 MarkThe temperature coefficient for alloys is ……………….AnswerLow.View full question & answer→
Question 181 MarkA material with a negative temperature coefficient is called a ……………….AnswerThermistor.View full question & answer→
Question 191 MarkIn insulators and semiconductors, as temperature increases, resistance ……………….AnswerDecreases.View full question & answer→
Question 201 MarkWith the increase of temperature, the resistance of conductors ……………….AnswerincreasesView full question & answer→
Question 221 MarkThe phenomenon of superconductivity was discovered by ……………….AnswerKammerlingh onnes.View full question & answer→
Question 241 MarkConductors turn into superconductors at ……………….AnswerLow temperatures.View full question & answer→
Question 251 MarkThe materials which conduct electricity at zero resistance are called ……………….AnswerSuperconductors.View full question & answer→
Question 261 MarkThe resistivity of semiconductors is of the order of ……………….Answer$ 10^{-2}-10^2 \Omega m \text {. } $View full question & answer→
Question 271 MarkThe resistivity of insulators is of the order of ……………….Answer$ 10^8 10^{14} \Omega m \text {. } $View full question & answer→
Question 281 MarkWith increase in temperature the resistivity of metals ……………….AnswerIncreases.View full question & answer→
Question 291 MarkThe reciprocal of electrical resistivity is called ……………….AnswerElectrical conductivity.View full question & answer→
Question 301 MarkThe unit of specific resistance is ……………….AnswerOhm meter.View full question & answer→
Question 311 MarkThe reciprocal of resistance is ……………….AnswerConductance.View full question & answer→
Question 321 MarkThe drift velocity acquired per unit electric field is the ……………….AnswerMobility.View full question & answer→
Question 331 MarkThe rate of flow of charge through any wire is called ……………….AnswerCurrent.View full question & answer→
Question 341 MarkThe flow of free electrons in a conductor constitutes ……………….AnswerElectric current.View full question & answer→
Question 351 MarkThe net flow of charge at any point in the conductor is ……………….AnswerZero.View full question & answer→
Question 361 MarkWhen n resistors of equal resistance (R) are connected in series, the effective resistance is ……………….AnswernR.View full question & answer→
Question 371 MarkIn the case of insulators, as the temperature decreases, resistivity ……………….AnswerIncreases.View full question & answer→
Question 381 MarkA toaster operating at 240 V has a resistance of 120 Ω. The power is ……………….Answer480 W.View full question & answer→
Question 391 MarkThe material through which electric charge can flow easily is ……………….AnswerCopper.View full question & answer→