Question Text
Question 1 :
Which of the following option has no effect on an electric fuse wire?
Question 3 :
Which of the following will produce maximum wastage of electricity ?
Question 5 :
State whether true or false:A permanent magnet is used in an electric bell.     <br/>
Question 7 :
Where the main fuse in a house circuit is connected ?
Question 8 :
State whether true or false.<br/>When a short-circuit takes place, the fuse wire melts and breaks the electric circuit.<br/>
Question 9 :
To protect the electrical appliances the fuse wire in electric supply line is connected in
Question 10 :
State whether true or false.<br/>Fuses should be connected to the neutral wire.<br/>
Question 13 :
Why is the fuse wire fitted in a porcelain casing ?
Question 15 :
Assertion: Kinematics of electric bell can be considered to have single degree of freedom.
Reason: Electric bell has only one moving part
Question 16 :
Assertion: On a vibrating bell, the bell will ring continuously until the power is cut off.
Reason: These have to be mechanically controlled
Question 18 :
Which of the following is the function of MCB in household circuit?
Question 19 :
State whether true or false :<br>An electromagnet can produce very strong magnetic force as compared to permanent magnet.
Question 20 :
Which of these devices uses a magnet or electromagnet to make it work?