Question 1 :
Three fuse wires A, B and C tinned copper having identical cross section and length 8 cm, 12 cm and 16 cm are used as fuses. For the same value of current

Question 4 :
State whether true or false:A permanent magnet is used in an electric bell. &#160; &#160;&#160;<br/>

Question 6 :
Why is the fuse wire fitted in a porcelain casing ?

Question 7 :
&#160;Mixture circuit breaker (MCB) works on the heating effect of current.

Question 8 :
What is&#160;the meaning of the statement &#34;the current rating of a fuse is $5 A$&#34; ?

Question 10 :
If a fuse is rated as 8 A, and current more than 8 A passesthrough it then

Question 11 :
Which of the following will produce maximum wastage of electricity ?

Question 12 :
State whether true or false.<br/>Fuses should be connected to the neutral wire.<br/>

Question 14 :
Two identical fuses are rated at 10 A. If they are joined<br>(A) in parallel, the combination acts as a fuse of rating 20 A<br>(B) in parallel, the combination acts as a fuse of rating 5 A<br>(C) in series, the combination acts as a fuse of rating 10 A<br>(D) in series, the combination acts as a fuse of rating 20 A<br>Select the correct options

Question 17 :
An electric iron draws a current of 15 A from a 220 V supply. What is the cost of using iron for 30 min everyday for 15 days if the cost of unit (1 unit $=$ 1 k W hr) is 2 rupees?

Question 18 :
Where the main fuse in a house circuit is connected ?

Question 22 :
What specifications would you select for the material to make a fuse wire?<br/>

Question 23 :
Complete the following sentences :&#160;A fuse is a short piece of wire of high .......... and of material of low ..........

Question 24 :
The rating of a fuse connected in the general householdlighting circuitis:

Question 26 :
Complete the following sentences :A fuse wire is made of an alloy of .......... and ..........

Question 28 :
Assertion: Fuse wire must have high resistance and low melting point. Reason: Fuse is used for small current flow only.

Question 29 :
Two identical fuses are rated at 10A. If they are joined<br><br>

Question 30 :
An electromagnets magnetic field can be rapidly manipulated over a wide range by controlling the amount of electric current supplied to the electromagnet.&#160;<br/>State whether the above statement is true or not?

Question 32 :
Two identical fuses are rated at $10\space A$. If they are joined

Question 33 :
Which process is applied on a circuit for the working of an electric bell?

Question 34 :
A fuse wire with a radius of $0.1 mm$ blows up at $5 A$. The radius of another fuse wire made of the same material which will blow up at $40 A$ is _____.