Question 1 : For a metallic conductor, Ohm’s law holds provded
answer
temperature remains constant
Question 2 : The diagram shown is called a ________________
answer
wheatstone bridge
Question 3 : Which of the following is correct?
answer
Kirchoff’s loop rule represents conservation of charge
Question 4 : A device which may be used to compare the potential differences of electric cells is called ———–
answer
potentiometer
Question 5 : The slide wire of the figure shown is balanced when the the uniform slide wire AB is divided as shown. The value of the resistance X is _________________ [Math Processing Error]
answer
2
Question 6 : A slide-wire potentiometer is balanced against 1.0182V standard cell at slide contact of 40.2cm. For an unknown emf the slide contact is 11.9cm.What is the emf of the unknown cell?
answer
0.30V
Question 7 : The name of the device which provides sliding contact with the potentiometer wire is called ———–
answer
rheostat
Question 8 : The unit of electrical energy expended per unit time is calledd ——–
answer
joule
Question 9 : Which of these is not a useful precaution in an electrical experiment?
answer
jockeys should be dragged on resistance wires
Question 10 : A device known as ———- may be used for comparison of resistances
answer
potentiometer
Question 11 : The bending of a ray of light as it travels from one transparent medium to another is called ——–
answer
diffraction
Question 12 : The term “lost volts” is used to describe ———- of a cell
answer
total current
Question 13 : The advantage of potentiometer over voltmeter in measurements of emf is that
answer
it does not draw current from the circuit under test
Question 14 : In an experiment, potential difference is plotted on the ordinate (vertical axis) and current on the abscissa(horizontal axis). The slope of the graph represents
answer
resistance
Question 15 : In the construction of an ammeter, a low resistance called resistance———— is connected in parallel to a suitable galvanometer
answer
shunt
Question 16 : A 1m[Math Processing Error] resistor is to be made from a 1-mm diameter wire of resistivity $2.8\time10{-8}.Find the length of the wire
answer
2.8cm
Question 17 : The difference between the emf of a battery and the lost volts when discharging is called
answer
terminal voltage
Question 18 : The time rate of flow of charge across a unit cross-sectional area of a conductor defines
answer
electromotive force
Question 19 : Which of the following is not true about a rheostat?
answer
It is used for varying the resistance in a circuit
Question 20 : Two resistances of [Math Processing Error] each are connected in parallel and then connected in series to a [Math Processing Error] resistance. What is the equivalent resistance
answer
3[Math Processing Error]
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