Advertisements
Advertisements
Question
What determines the direction of flow of electrons between two charged conductors kept in contact?
Advertisements
Solution
The potentials of the two conductors determine the direction of flow of electrons. The electrons flow from the conductor at low potential to the conductor at high potential.
RELATED QUESTIONS
Calculate the number of electrons constituting one coulomb of charge.
Which particles constitute the electric current in a metallic conductor?
Why should the resistance of:
an ammeter be very small?
An electric bulb of resistance 20 Ω and a resistance wire of 4 Ω are connected in series with a 6 V battery.
Draw the circuit diagram, and calculate:
(a) total resistance of the circuit.
(b) current through the circuit.
(c) potential difference across the electric bulb.
(d) potential difference across the resistance wire.
Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs:
(a) for decorating a hotel building from outside?
For a heater rated at 4 kW and 220 V, calculate:
(a) the current,
(b) the resistance of the heater,
(c) the energy consumed in 2 hours, and
(d) the cost if 1 kWh is priced at Rs 4.60.
Tick(✓) the correct choice in the following:
24 watt, 12 volt head lamp is fully lit by connecting it to a 12 volt
battery. The working resistance of the lamp is
Complete the following:
1 kWh = _________ J
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
Kilowatt hour is the unit of
