Advertisements
Advertisements
प्रश्न
The work done in moving a unit charge across two points in an electric circuit is a measure of:
(a) current
(b) potential difference
(c) resistance
(d) power
Advertisements
उत्तर
potential difference
The work done in moving a unit charge across two points in an electric circuit is a measure of potential difference.
APPEARS IN
संबंधित प्रश्न
By what name is the physical quantity coulomb/second called?
If 20 C of charge pass a point in a circuit in 1 s, what current is flowing?
Fill in the folloing blank with suitable words:
A current is a flow of ............... .For this to happen there must be a ............... circuit.
In the circuit diagram given below five resistances of 10 Ω, 40 Ω, 30 Ω, 20 Ω, and 60 Ω are connected as shown to a 12 V battery.
Calculate:
(a) total resistance in the circuit.
(b) total current flowing in the circuit.
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.
(b) In which circuit, if one bulbs be brighter?
In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.
- A and B
- A and C
A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.
What is international convention of colour coding in a cable?
Define the following:
Super conductors
What is the criteria for selecting a fuse wire?
If a fuse contains a 5 A fuse wire and the voltage is 240 V, what is the maximum power (wattage) which may be taken from the circuit?
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
What is the function of a step-up transformer?
Define the term kilowatt - hour and state its value in S.I. unit.
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
MCB is used to protect household electrical appliances.
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 |
Unit of electric power may also be expressed as
For current to flow, one needs art open circuit.
