5 Questions MCQ Test Science & Technology for UPSC CSE - Test: Current & Voltage
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Conventional direction of electric current is from
Detailed Solution for Test: Current & Voltage - Question 2
The current in the wire is due to the drifting of electrons inside a wire in a direction opposite to the flow of electrons. During their drifting they collide with their atoms vibrating about their mean position and lose some of kinetic energy to the vibrating atoms.
The electrons are negatively charged particles and so, the electrons move towards the positively charged terminal from the negatively charged terminal.
Hence, the statement is true as the conventional direction of flow of current is from positive terminal to negative terminal of the cell.
The opposing capacity of materials against the current flow is
Detailed Solution for Test: Current & Voltage - Question 5
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
Resistance in a conductor can be defined as the opposition offered to the flow of electrons. For a conductor of uniform cross-sectional area resistance is directly proportional to the length of the conductor and inversely proportional to the cross-sectional area of the conductor.
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