English

What Should Be the Current Rating of a Fuse to Be Used with an Electric Appliance of Rating 1.5 Kw-220 V? How is the Fuse Connected with the Appliance?

Advertisements
Advertisements

Question

What should be the current rating of a fuse to be used with an electric appliance of rating 1.5 kW-220 V? How is the fuse connected with the appliance?
Numerical
Advertisements

Solution

Given, P = 1.5 kW= 1500 W, p.d. = 220 V

We know that,

P=VI

I = `"P"/"V" = 1500/220` = 6.8 A

Thus a fuse of rating 7A may be used with the appliance and it should be connected in the live wire before connectimg it to the appliance.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Electricity and Magnetism - Exercise 4.2 ii [Page 188]

APPEARS IN

Frank Physics Part 2 [English] Class 10 ICSE
Chapter 4 Electricity and Magnetism
Exercise 4.2 ii | Q 13 | Page 188

RELATED QUESTIONS

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.

 


You can given one hundred 1 Ω resistors. What is the smallest and largest resistance you can make in a circuit using these?


Many electrical appliances and circuits are earthed grounded. What is the reason for this?

Tick(✓) the correct choice in the following:

24 watt, 12 volt head lamp is fully lit by connecting it to a 12 volt
battery. The working resistance of the lamp is


Tick(✓) the correct choice in the following:

A three pin plug is connected to the lead for a 1 kW electric iron to be
used on a 250 V supply. Which of the following statements is not correct?


What is the criteria for selecting a fuse wire?


Fig.  shows a 3 pin plug with the cover removed. The electric cable
connected to the plug contains 3 wires with colour coded insulation namely brown, blue and green.

  1. Identify each of the colour coded wires by stating to which of the
    terminals A, B or C in the diagram they should be connected.
  2. Identify the terminal through which no current passes in normal
    circumstances.
  3. What is the purpose of the earthed wire connected to an electric
    appliance like an electric heater? Describe how it works.

Tick (✓) the correct choice among the following :

In fig .XY is at right angles to the magnetic field. The direction in
which XY should be moved to induce an electron flow in the direction Y to X as indicated by the arrow is


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

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×