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WorksheetsElectric Current and its Effects
Total questions: 15
Worksheet time: 11mins
The coil of wire contained in an electric heater is known as:
Component
Element
Circuit
Spring
The amount of heat produced in a wire depends on:
Material
Length
Thickness
All of these
None of these
A fuse is used to save energy in electrical circuits.
True
False
Is there anything wrong in this circuit diagram?
Yes, something is wrong.
No, nothing is wrong.
In the question where a circuit diagram was shown, tell why or why not was circuit was wrong?
A ______ is a safety device which prevents damage to electrical circuits and possible fires
MCB
Fuse
Switch
Car Key
The effects of current are:
Heating Effect
Lighting Effect
Magnetic Effect
Charging Effect
Longer line in cell symbol?
+ve
-ve
The degree to which a material opposes the passage of current through itself is called (a) .
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
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
Which one of the following is the most energy efficient
LED
Incandescent bulb
CFL
A combination of two or more cells is called
A button cell
A battery
An electric cell
Truck battery
WHo discovered the magnetic effect of current?
Galileo Galilei
Newton
Marconi
Hans Christian Oersted
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
