Question Text
Question 1 :
At the time of short circuit, the current in the circuit
Question 2 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside coil?
Question 5 :
The most important safety method used for protecting home appliances from short circuiting or overloading is
Question 7 :
The strength of magnetic field inside a long current carrying straight solenoid is
Question 8 :
The essential difference between an AC generator and a DC generator is that
Question 9 :
It is established that an electric current through a metallic conductor produces a magnetic field around it. Is there a similar magnetic field produced around a thin beam of moving alpha particles?
Question 10 :
Which of the following properties of a proton can change while it moves freely in a magnetic field?
Question 11 :
A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each
Question 12 :
How many times does AC used in India change direction in one second ?
Question 13 :
State TRUE or FALSE. Bicycle dynamos, car alternators and Power House generators are the sources of direct current.
Question 17 :
A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased ?
Question 18 :
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is pushed into the coil?
Question 19 :
An electric oven of 2 kW power rating is operated in a domestic electric circuit (220V) that has a current rating of 5 A. Will the fuse blow off?