Advertisements
Advertisements
प्रश्न
Why should the resistance of:
an ammeter be very small?
उत्तर
An ammeter should have a very low resistance so that it will not change the value of the current flowing in the circuit.
APPEARS IN
संबंधित प्रश्न
The p.d. across a 3 Ω resistor is 6 V. The current flowing in the resistor will be:
(a) `1/2A`
(b) 1 A
(c) 2 A
(d) 6 A
In the circuit shown below, the voltmeter reads 10 V.
(a) What is the combined resistance?
(b) What current flows?
(c) What is the p.d. across 2 Ω resistor?
(d) What is the p.d. across 3 Ω resistor?
Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? why?
Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V, 5 Ω, 10 Ω and 15 Ω resistors and a plug key, all connected in series.
Tick(✓) the correct choice in the following:
When the length of a conductor is doubled the resistance of the conductor
will
Tick(✓) the correct choice in the following:
A three pin plug is connected to the lead for a 1 kW electric iron to be
used on a 250 V supply. Which of the following statements is not correct?
Explain, why the potential difference across the terminals of a cell is more when the cell is not in use than it is when the cell is being used.
State the condition when it is advantageous to connect cells in parallel.
Find the odd one out.
What does the direction of current convey?
