Advertisements
Advertisements
प्रश्न
The circuit diagram in fig shows two coils of an insulated copper wire wound on a cardboard tube. G is a center zero galvanometer.
(a) Describe what will happen when th e swi tch K is cl osed for severa l
seconds and then opened again .
(b) What will be the effect of repeating the experiment with an iron placed in the tube?
Advertisements
उत्तर
(a) We will observe that the needle of the galvanometer instantly jumps to one side and just as quickly returns to zero, indicating a momentary current in coil connected to galvanometer.
(b) Introducing an iron bar in the tube, will increase the amount of induced current and the galvanometer will show a greater deflection.
APPEARS IN
संबंधित प्रश्न
What is an Ammeter? How is It Connected in a Circuit? Draw a Diagram to Illustrate Your Answer.
Why should the resistance of:
an ammeter be very small?
Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Complete the following:
1 kWh = _________ J
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The resistance of the bulb
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
