मराठी

Name Two Effects Produced by Electric Current. - Science

Advertisements
Advertisements

प्रश्न

Name two effects produced by electric current. 

 

Advertisements

उत्तर

The two effects produced by an electric current are:
(i) Heating effect
(ii) Chemical effect

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Electricity - Exercise 8

APPEARS IN

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Define the unit of current.


Which particles constitute the electric current in a metallic conductor?


 In which direction does conventional current flow around a circuit?


How many microamperes are there in 1 ampere?


In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result. 

What is the p.d. across the battery?


A p.d. of 6 V is applied to two resistors of 3 Ω and 6 Ω connected in parallel. Calculate:

(a) the combined resistance
(b) the current flowing in the main circuit
(c) the current flowing in the 3 Ω resistor. 

  


A 5 V battery is connected to two 20 Ω resistors which are joined together in series.

(a) Draw a circuit diagram to represent this. Add an arrow to indicate the direction of conventional current flow in the circuit.
(b) What is the effective resistance of the two resistors?
(c) Calculate the current that flows from the battery?
(d) What is the p.d. across each resistor?


 An electrician has wired a house in such a way that if a lamp gets fused in one room of the house, all the lamps in other rooms of the house stop working. What is the defect in the wiring?


A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire


Three resistors of 6.0 𝛀, 2.0𝛀 and 4.0𝛀 are joined to an ammeter A and a cell of e.m.f. 6.0 V as
shown in fig 8.52 Calculate:
(a) the effective resistance of the circuit and
(b) the reading of ammeter. 

 


Tell the odd one out. Give a proper explanation.


If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?


The work done in moving unit positive charge across two points in an electric circuit is a measure of
           


60 joules of heat was dissipated in a resistor when 20 C flowed for 5 s. Calculate:
(a) P.d. across the resistor,
(b) Resistance of the resistor, and
(c) Average power dissipated in the resistor.


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

Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. Calculate :

The total current taken from the supply


A geyser is rated 1500 W, 250 V. This geyser is connected to 250 V mains. Calculate:

  1. The current drawn,
  2. The energy consumed in 50 hours, and
  3. The cost of energy consumed at ₹ 4.20 per kWh.

Answer the following question.
What is the function of a galvanometer in a circuit?


An electrical gadget can give an electric shock to its user under certain circumstances. Mention any two of these circumstances.


Kilowatt hour is the unit of


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×