Bihar Board Class 12 (Science) Current Electricity — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Bihar Board Class 12 (Science) Current Electricity in the app →An electric current is constituted by:Materials that carry current when a field is applied are:Ohm's law states that V is proportional to:Doubling the length of a conductor makes its resistance:Halving the cross-section area of a conductor makes resistance:The resistance inside a cell itself is called its:Resistance is inversely proportional to the conductor's:The average time between electron collisions is called:The drift velocity of electrons points:Drift velocity is small compared with the electrons':Internal resistance of a cell may be neglected when it is:Compared with electrolytic cells, dry cells have internal resistance that is:Two cells joined can be replaced by one cell of equivalent:How many rules did Kirchhoff give for circuit analysis?Kirchhoff's junction rule for currents I1, I2 into a junction gives:The quantity denoted by sigma, the inverse of resistivity, is:Resistance depends on the material and on the conductor's:If two identical slabs are joined end to end, the combined resistance is: