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Worksheetselectric current and its effects
Total questions: 15
Worksheet time: 7mins
Which mark is necessary on electric appliances?
AGMARK
ISI
FICCI
KSK
If a positive terminal of one cell is connected to the negative terminal of the next cell it is known as
Electric current
Fuse
Battery
Element
Which of these following cannot be harmed by electric current
Plastic
Rubber
A & B
All of the above
Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
Directed to the right
Directed to the left
Equal to the magnetic field
n the same direction as the magnetic field
An Electric charge in a uniform motion produces
An Electric Field only
An Magnetic field only
Both Electric Field & Magnetic field
Neither of them
A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then
The wire will experience a force along the direction of the magnetic field
The wire will not experience any force
The wire will experience the torque
The wire will experience a perpendicular force
Who was the first to observe the magnetic effect of electric current?
Faraday
Oersted
Volta
Ampere
Identify the poles of the magnet in the given figure.
NORTH
SOUTH
One is north and the other is south
Can't predict
Which of the following diagrams correctly shows the magnetic field produced by a current- carrying wire?
A
B
C
D
A device used to measure the amount of electric current flowing through a circuit.
Ammeter
Voltmeter
Resistor
Battery
Current flows through the circuit when the circuit is in the _________________condition.
Broken
Open
Closed
Incomplete
The magnetic field around a current carrying coil
Lasts for three hours
Lasts as long as current flows through it
Lasts till its half-life period
Is permanent
A fuse wire is made up of alloy
Nichrome
Tin-lead
Manganin
Constantan
Copper wires are used as connecting wires because
Copper has very high melting point
Copper wires are very thick wires
Copper wires offer a lower resistance
None of these
The device used to make or break an electric circuit is
Resistor
Battery
Switch
Ammeter
