Advertisements
Advertisements
प्रश्न
What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?
Advertisements
उत्तर
The conventional direction of the flow of electric current is from the positive terminal of a cell or a battery to its negative terminal through the outer circuit, whereas the direction of flow of electrons is from the negative terminal to the positive terminal of a cell.
APPEARS IN
संबंधित प्रश्न
Calculate the number of electrons constituting one coulomb of charge.
Which of the following equation shows the correct relationship between electrical unit?
1A = 1C/s or 1c= 1A/s
Which instrument is used to measure electric current? How should it be connected in a circuit?
If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is:
(a) 30 A
(b) 0.3 A
(c) 0.5 A
(d) 5 A
The circuit diagram given below shows the combination of three resistors R1, R2 and R3:
Find :
(i) total resistance of the circuit.
(ii) total current flowing in the circuit.
(iii) the potential difference across R1.
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?
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.
(c) In which circuit, if one bulb blows out, all other will stop glowing?
In which of the following cases more electrical energy is consumed per hour?
(i) A current of 1 ampere passed through a resistance of 300 ohms.
(ii) A current of 2 amperes passed through a resistance of 100 ohms.
State the S.I. unit of current.
The rating of a fuse connected in the lighting circuit is:
(a) 15 A (b) 5 A (c) 10 A (d) Zero
The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.
The circuit diagram (Fig.) shows a battery of e.m.f. 6 volts and internal
resistance of 0.8 Ω oonnected in series. Find the
(a) Current reoorded by the ammeter,
(b) P.d. across the terminals of the resistor B,
( c) Current passing through each of the resistors B, C and D, and
( d) P.d. across the terminals of the battery.
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 |
An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply?
One unit of electrical energy consumed is equal to 1000 kilowatt-hour.
Unit of electric power may also be expressed as
The number of electrons constituting a 1-coulomb charge is ______.
What is the rate at which charges flow past a point on a circuit?
