Advertisements
Advertisements
प्रश्न
Draw the electrical symbols of the following components and state its use
Wire crossing
उत्तर
Wire crossing:
Use: To cross wires without any joints in the circuit.
APPEARS IN
संबंधित प्रश्न
Three 2 V cells are connected in series and used as a battery in a circuit.
What is the p.d. at the terminals of the battery?
How many microamperes are there in 1 ampere?
Why should the resistance of:
an ammeter be very small?
If the current through a floodlamp is 5 A, what charge passed in 10 seconds?
(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
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.
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
State whether the current is a scalar or vector?
An electric bulb is marked '100 W, 250 V'. What information does this convey?
Calculate the current through a 60 W lamp rated 250 V. If the line voltage falls to 200 V, how is power consumed by the bulb affected?
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.
State expression for Cells connected in series.
State the condition when it is advantageous to connect cells in series.
Kilowatt hour is the unit of
Assertion (A): Electric current will not flow between two charged bodies when connected if their charges are the same.
Reason (R): Current is the rate of flow of charge.