Advertisements
Advertisements
प्रश्न
1 A = _________ mA
- 102
- 103
- 10-3
- 10-6
उत्तर
(b) 103 mA
1 ampere = 1000 mA = 103 mA
APPEARS IN
संबंधित प्रश्न
What does an electric circuit mean?
Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason?
How many milliamperes as there in 1 ampere?
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
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 0.12 Ω. How much current would flow through the 12 Ω resistor?
In the circuit diagram given below, three resistors R1, R2, and R3 of 5 Ω, 10 Ω and 30 Ω, respectively are connected as shown
Calculate:
- current through each resistor.
- total current in the circuit.
- total resistance in the circuit.
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(d) Which circuit would have less current in it?
The lamps in a house hold circuit are connected in parallel because:
(a) this way they required less current
(b) if one lamp fails the others remain lit
(c) this way they require less power
(d) if one lamp fails the other also fail
The following table shows the current in Amperes and potential differences in Volts.
- Find the average resistance.
- What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)
- Which law will the graph prove? Explain the law.
V (volts) | I (amp) |
4 | 9 |
5 | 11.25 |
6 | 13.5 |
What is the criteria for selecting a fuse wire?
Tick (✓) the correct choice among the following :
There are 500 turns and 2000 turns in the primary and secondary coil of a
transformer respectively. If th e output voltage is 1000 V, how large is the
input voltage?
An electrical gadget can give an electric shock to its user under certain circumstances. Mention any two of these circumstances.
Three resistances, of which two are equal when connected in series have an effective resistance of 30 ohms. When the three resistances are connected in parallel, the effective resistances is 3 ohms. Find the values of the individual resistances.
______ is used to measure the electric current.
Match the following:
1. | 1 mA | a. | series |
2. | 1 pA | b. | ohmmeter |
3. | Ammeter | c. | 10-6 ampere |
4. | Electrical resistivity | d. | 10-3 ampere |