English

Which of the Following Characteristic is Not Suitable for a Fuse Wire? (A) Thin and Short (B) Thick and Short (C) Low Melting Point (D) Higher Resistance than Rest of Wiring

Advertisements
Advertisements

Question

Which of the following characteristic is not suitable for a fuse wire?

(a) thin and short
(b) thick and short
(c) low melting point
(d) higher resistance than rest of wiring

Advertisements

Solution

thick and short
This is so because in this case, the resistance of the wire will be low.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Electricity - Exercise 8 [Page 259]

APPEARS IN

Lakhmir Singh Physics Part 1 [English] Class 10
Chapter 4 Electricity
Exercise 8 | Q 27. | Page 259

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

When current is switched ‘on’ in a room heater, it ______.


The safety device based on the heating effect of electric current is called a ______.


An electric iron of resistance 20 ohms draws a current of 5 amperes. Calculate the heat produced in 30 seconds.


A resistance of 25 Ω is connected to a 12 V battery. Calculate the heat energy in joules generated per minute.


Give Scientific reasons.

In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.


Find the odd one out and give its explanation.


Which metal is used to make the filament of an electric bulb?


Which of the following is correct?


An electric iron consumes energy at the rate of 420 W when heating is at the maximum rate and 180 W when heating is at the minimum rate. The applied voltage is 220 V. What is the current in each case?


An electric iron draws a current of 4 A when connected to 220 V mains. Its resistance must be:


A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of:


When a switch is in OFF position,

  1. circuit starting from the positive terminal of the cell stops at the switch.
  2. circuit is open.
  3. no current flows through it.
  4. current flows after some time. 

Choose the combination of correct answer from the following.


What are the uses of electromagnets?


What are the factors affecting heating effect of electric current?


Assertion: A current-carrying wire should be charged.
Reason: The current in a wire is due to the flow of free electrons in a definite direction.


Name the effect of the current responsible for the glow of the bulb in an electrical circuit.


An electric fuse is a wire made up of a material having ______ melting point.


Write an expression for the amount of heat produced in a resistor when an electric current is passed through it stating the meanings of the symbols used.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×