Sarika took distilled water in a bottle and tried to find whether it conducts electricity or not. What is she likely to find?
It is good conductor of electricity
It is an insulator
It is poor conductor of electricity
None of the above
Which one of the following statements is not correct?
There is a maximum limit of current which can safely flow in the electric circuit.
Fuses are inserted in electric circuits of all the buildings
If the proper fuse is inserted in a circuit, it will blow off, if the current is more than the safe limit.
There is a minimum limit of current which can safely flow in the electric circuit.
When a glass rod is rubbed with silk, then which type of charge is created on it?
Positive charge
Negative charge
Electric charge
None of these
Mica is used in cooking utensils because it is
good conductor of heat but bad conductor of electricity
bad conductor of heat but good conductor of electricity
good conductor of both heat and electricity
bad conductor of both heat and electricity
The angle of dip at magnetic pole of earth is
0°
45°
90°
135°
C.
90°
The angle between the total earth magnetic field and surface of the earth is known as angle of dip.Magnetic field of the magnetic pole of the earth is vertical. Thus angle (dip) made by total magnetic field with the surface of the earth is 90°.
A battery of 15 V is connected to a parallel group of resistance of 4, 10 and 20 . The current in the circuit will be
6 A
4 A
8 A
2 A