Font size
WorksheetsElectric current and its Effects
Total questions: 31
Worksheet time: 16mins
Which is this type of circuit?
Open circuit
Closed circuit
Both of these
None of these
This symbol represents a
electric cell
wire
battery
bulb
A combination of 2 or more cells is called a ?
Electric cell
Battery
None of these
All of these
A fuse wire is an alloy of ________ and _______ .
Steel and copper
iron and nickel
lead and tin
cobalt and iron
This is a ________________ fuse ?
Plug
Cartridge
MCB
Full form of MCB is ?
Miniature Circuit Breaker
Minute Circuit Builder
Both of these
None of these
Which is a plug fuse among these ?
Which is the type of circuit shown here ?
Open circuit
Closed circuit
None of these
this is the symbol for a ___________.
electric cell
electric bulb
switch ' ON '
switch 'OFF'
find the incorrect statement.
Closed circuit means a complete electrical connection around which current flows or circulates.
A key or a switch can be placed only at a specific place in a circuit
Never touch a lighted electric bulb connected to the mains .
one reason for excessive currents in electrical circuits is the direct touching of wires
Our body is a _______________ of electricity ?
Conductor
Insulator
None of these
The amount of heat in a wire depends on
Length
Material
Capacity
Both length and material
All of these
The coil of wire in an electric heater is called
Component
Element
Circuit
Spring
What is the full form of I S I ?
Indian Space Institute
Indian Standard Institute
Indian Shipping Institute
Wires made from some special materials melt quickly and break when large electric currents are passed through them. These wires are used for making ____________ ?
Electric switch
Electric bulb
Electric shock
Electric fuses
In making a battery
positive terminal of one cell is connected to the negative terminal of the next cell
positive terminal of one cell is connected to the positive terminal of the next cell
negative terminal of one cell is connected to the negative terminal of the next cell
none of the above
Where can the key or switch be placed in the circuit?
Left side of the battery
Right side of the battery
Can be placed anywhere in the circuit
Near the positive terminal of the bulb
Which one of the following is based on the heating effect of current?
Geyser
Hair dryer
Immersion rod
All of these
Who invented MAGNETIC EFFECT OF ELECTRIC CURRENT ?
Hans Zimmer
Hans Christian Oersted
Hans Christian Andersen
Can U identify HANS CHRISTIAN OERSTED ?
Which mark is necessary on electric appliances?
AGMARK
ISI
FICCI
CFL
When an electric current flows through a copper wire AB as shown in Figure, the wire
deflects a magnetic needle placed near it
becomes red hot
gives electric shock
behaves like a fuse
Choose the statement which is not correct in the case of an electric fuse.
Fuses are inserted in electric circuits of all buildings.
There is a maximum limit on the current which can safely flow through the electric circuits.
There is a minimum limit on the current which can safely flow in the electric circuits.
If a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit.
In an electric circuit a fuse is a ………………….. to prevent possible fire.
safety device
harmful device
Crane has a strong ………………….. attached to it.
Artificial magnets
Electromagnets
Magnets
STATE WHETHER TRUE OF FALSE
It is convenient to represent electric components by symbols.
True
False
When current is passed through a conductor, the heat produced in it depends upon
A) I and II only
B) I and III only
C) II and III only
D) All I, II and III
Which of the following appliances does not use an electromagnet?
A) Washing machine
B) Refrigerator
C) Electric heater
D) Electric bell
When the strength of the current flowing through a coil is increased, which of the following statements is true for it?
A) Strength of the magnetic field decreases
B) Strength of the magnetic field increases
C) Amount of heat generated due to resistance decreases
D) Strength of the magnetic field remains constant
1. I can shave everyday , but my beard will stay the same ......
( WHO AM I ? )
A barber
A shepherd
A carpenter
A milkman
What is full of holes but still holds water?
(a)
