Practice Test

Q1) What the determines the emf between the two metals placed an electrolyte?
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Q2) Two charges are placed at a certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges? Show Answer

Q3) Voltameter cannot be used to measure Show Answer

Q4) Two unequal resistances are connected in parallel across a cell. Which of the following statement is true? Show Answer

Q5) The potential difference across a conductor is doubled, the rate of generation of heat will Show Answer

Q6) On increasing the temperature of a conductor, its resistance increases because Show Answer

Q7) The length of conductor is doubled and its radius is halved, its specific resistance is Show Answer

Q8) Electric potential is Show Answer

Q9) Where is the electric potential due to a charged shell constant? Show Answer

Q10) A charge is moved against electric repulsion in an electric filed. Which of the following is correct? Show Answer

Q11) Electric intensity is equal to Show Answer

Q12) Electric lines of force about a +ve point charge are Show Answer

Q13) How does the electric field strength very when we enter a uniformly charged spherical cloud? Show Answer

Q14) Constantan wire is used for making statement resistance, because it has Show Answer

Q15) Identify the set in which all the three material are good conductors of electricity Show Answer

Q16) Which of the following has negative temperature coefficient of resistance? Show Answer

Q17) A galvanometer can be converted into an ammeter by connecting a Show Answer

Q18) A galvanometer can be converted into a voltmeter by connecting a Show Answer

Q19) A metallic resistor is connected across a battery, If the number of collisions of the free electrons with the lattice is some how decreased in the resistor (e.g.,by cooling it,) the current will Show Answer

Q20) What are the essential requirements for the heater filament? Show Answer

Q21) In which of the following substances the resistance decreases with an increases of temperature? Show Answer

Q22) Same current is being passed through a copper voltmeter and a silver voltmeter. The rate increase in Weights of the cathodes in the two voltmeters will be proportional to. Show Answer

Q23) A positively charged glass rod is brought near the disc of uncharged gold leaf electroscope. The leaves diverge. Which of the following statement is correct? Show Answer

Q24) If a resistance wire is drawn to increase its length by 0.1%, then percentage increase in its resistance will be Show Answer

Q25) In a conductor, a charge of C flows for 2 s. The value of electric current will be Show Answer

Q26) If 0.1% increase in length due to stretching occurs, the percentage increase in resistance of wire will be Show Answer

Q27) Current of 4.8 A is flowing through a conductor.The number of electrons per second will be Show Answer

Q28) An ideal voltmeter of 1 V has the resistance equal to Show Answer

Q29) In a conductor, the flow of current is Show Answer

Q30) On increasing the temperature of a conduction its resistance increases because Show Answer

Q31) Which of the following does not allow the electric filed lines to cross each other? Show Answer

Q32) An electron with charge e revolves in a circle of radius r. This constitutes a current equivalent to Show Answer

Q33) When electric current is passed through a metallic conductor, the amount of heat produced in the conductor depends on its? Show Answer

Q34) LED and CFL are very commonly used as sources of light in homes. Which of the following statement is true? Show Answer

Q35) A freely suspended bar magnet always comes rest in a particular direction? Show Answer