मराठी

Write Down the Formula Which Relates Electric Charge, Time and Electric Current

Advertisements
Advertisements

प्रश्न

 Write down the formula which relates electric charge, time and electric current

Advertisements

उत्तर

If a charge of Q coulombs flows through a conductor in time t seconds, the magnitude, I of the electric current flowing through it is given by: 

`I=Q/t` 

 

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Electricity - Exercise 2 [पृष्ठ १९७]

APPEARS IN

लखमीर सिंह Physics Part 1 [English] Class 10
पाठ 4 Electricity
Exercise 2 | Q 19. (a) | पृष्ठ १९७

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

An electric bulb of resistance 20 Ω and a resistance wire of 4 Ω are connected in series with a 6 V battery.
Draw the circuit diagram, and calculate:

(a) total resistance of the circuit.
(b) current through the circuit.
(c) potential difference across the electric bulb.
(d) potential difference across the resistance wire.


 Christmas tree lamps are usually wired in series. What happens if one lamps breaks?


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


Using the circuit given below, state which of the following statement is correct?  

(a) When S1 and S2 are closed, lamps A and B are lit.22
(b) With S1 open and S2 closed, A is lit and B is not lit.
(c) With S2 open and S1 closed A and B are lit.
(d) With S1 closed and S2 open, lamp A remains lit even if lamp B gets fused.


A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?


Match the pairs.

‘A’ Group  ‘B’ Group 
1. Free electrons a. V/R 
2. Current b. Increases the resistance in the circuit 
3. Resistivity c. Weakly attached 
4. Resistances in series d. VA/LI

What are the conditions under which charges can move in a conductor?

A 200 v electric transfer draws an electric current of 11 A. What is its electrical resistance?

What do you mean by A.C.?

Explain the meaning of the term kilowatt hour.

What is the purpose of a fuse in an electrical circuit?


An electric kettle has a heating element which is rated at 2 kW when connected to a 250 V electric supply. Calculate the
(a) Current which flows in the element when it is connected to a 250 V supply,
(b) Resistance of the filament,
(c) Heat produced in 1 minute by the element,
(d) Cost of running the kettle for 10 minutes a day for 30 days of the month, at the rate of Rs. 3.00 per unit.


Transformers are usually designed so that their efficiency is as close to 100% as possible. Describe two features in transformer design which help to achieve high efficiency?

An electric bulb is marked '100 W, 250 V'. What information does this convey?


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 total energy supplied by the battery in 10 minutes


State the condition when it is advantageous to connect cells in series.


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.


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

What is the rate at which charges flow past a point on a circuit?


The value used for practical measurement of Alternating Current is the:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×