Advertisements
Advertisements
प्रश्न
What is the unit of electric current?
Advertisements
उत्तर
The SI unit of electric current is ampere and is denoted by the letter, A.
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
To increase the effective resistance in a circuit the resistors are connected in _____________.
Which particles constitute the electric current in a metallic conductor?
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
What happens to the other bulbs in a parallel circuit if one bulb blows off?
In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.
- A and B
- A and C
State the relation between work, charge and potential difference for an electric circuit.
If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
An electric current flowing in a wire creates ______ around the wire.
The work done in moving unit positive charge across two points in an electric circuit is a measure of
Two resistors P and Q of the same material and length but of different thickness are connected in parallel to a battery. The cross- sectional area of P is twice that of Q. What is the ratio of
(a) The resistance of P to the resistance of Q?
(b) The current in P to the current in Q?
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Electrical appliances have voltage and power ratings as listed below. Which
has the larger working resistance?
| Appliances | Voltage (V) | Power (W) |
| (a) Washing machine | 250 | 3000 |
| ( b) Television | 240 | 160 |
| (c)240 | 240 | 1500 |
| ( d) Hair curler | 250 | 20 |
| ( e) Car head lamp | 12 | 36 |
What determines the direction of flow of electrons between two charged conductors kept in contact?
Define an electric current.
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
A charge of 400C flows through a conductor for 13 minutes and 20 seconds. Find the magnitude of the current flowing through the conductor.
Match the items in column-I to the items in column-II:
| Column - I | Column - II |
| (i) electric current | (a) volt |
| (ii) potential difference | (b) ohm meter |
| (iii) specific resistance | (c) watt |
| (iv) Electrical power | (d) joule |
| (v) electrical energy | (e) ampere |
