Advertisements
Advertisements
प्रश्न
What is meant by the drift speed of free electrons?
Advertisements
उत्तर
The average minimum and maximum velocity of free electron between consecutive collisions with positive ions is called drift velocity.
APPEARS IN
संबंधित प्रश्न
Which of the following is an ohmic resistance?
In a conductor 6.25 × `10^16` electrons flow from its end A to B in 2 s. Find the current flowing through the conductor (e = 1.6 × `10^-19` C)
An ammeter placed in series with an electric radiator reads 0.5 amps and a voltmeter placed across it reads 230 volts. What is the resistance of the radiator?
The slope of voltage (V) versus current (I) is called:
The variable resistance is called ____________.
The temperature of a conductor is increased. The graph best showing the variation of its resistance is:
Calculate the total resistance of the circuit and find the total current in the circuit.
The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount of heat produced in the resistor will become ______.
Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition. Based on their demonstrated circuit, answer the following questions.
- State what happens when switch A is connected to:
a) Position 2
b) Position 3 - Find the potential difference across each lamp when lit.
- Calculate the current.
a) in each 12 Ω lamp when lit.
b) In each 4 Ω lamp when lit.
OR - Show, with calculations, which type of lamp, 4.0 Ω or 12 Ω, has the higher power.
