Advertisements
Advertisements
प्रश्न
What Makes an Electric Current Flow in a Wire?
Advertisements
उत्तर
The potential difference between the ends of the wire makes the current flow through the wire.
APPEARS IN
संबंधित प्रश्न
Define the unit of current.
What actually travels through the wires when you switch on a light?
Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an â’¶ on your diagram to show where an ammeter should be placed to measure the current.
How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?
If the current passing through a conductor is doubled, what will be the change in heat produced
A wire of uniform thickness with a resistance of 27Ω is cut into three equal pieces and they are joined in parallel. Find the equivalent resistance of the parallel combination.
Two resistors of 2.0 Ω and 3.0 Ω are connected (a) in series (b) in parallel, with a battery of 6.0 V and negligible internal resistance. For each case draw a circuit diagram and calculate the current through the battery.
Three resistors of 6.0 𝛀, 2.0𝛀 and 4.0𝛀 are joined to an ammeter A and a cell of e.m.f. 6.0 V as
shown in fig 8.52 Calculate:
(a) the effective resistance of the circuit and
(b) the reading of ammeter.
Find the effective resistance in the following circuit diagrams (Fig.):
Two cells each having an e.m.f. of 2 V and an internal resistance of 2Ω are
connected (a) In series, and ( b) In para 1le l as shown in fig. . What is the
current flowing through the cir cu it in each_ case?
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
Study the following circuit and find out:
(i) Current in 12 Ω resistor.
(ii) The difference in the readings of A1 and A2, if any.
Give the electric current unit.
Problems for practice:
If 5A current flows through a circuit, then convert the current in terms of microampere?
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
