WorksheetsEffects of electric current
Total questions: 10
Worksheet time: 10mins
A fuse wire is a wire of-
High resistivity and low melting point
High resistivity and high melting point
Low resistivity and low melting point
Low resistivity and high melting point
Connection of more than one device/ appliance to a single socket is called-
Overloading
Short circuit
Both
The filament of A bulb, is a wire of
High resistivity, low melting point
Low resistivity, low melting point
High resistivity, high melting point
Low resistivity, high melting point
The heating coils/elements of different electrical appliances are usually made from ________ or ________ wires.
1. Copper 2. Aluminum 3. Nichrome 4. Tungsten
1 & 2
1 & 4
2 & 4
3 & 4
When electric current flows through the metal filament of the bulb it gets heated to very high temperature and becomes______ hot and start emitting _______.
White, light
Red, light
White, heat
Red, heat
When electricity flows through heating coil it becomes ________ hot and gives out _______ energy, which is to put in practical use.
Red, heat
White, heat
Red, light
White, light
WHo discovered the magnetic effect of current?
Galileo Galilei
Newton
Marconi
H C Oersted
