What type of device converts electrical energy into mechanical energy
electric motors
generator
transformers
galvanometer
Q.2.
Moving a permanent magnet through a coil of wire will
demagnetize the magnet
the wire will become an electromagnet
the magnet will become electrified
a current will be generated in the wire
Q.3.
What type of device converts mechanical energy into electrical energy?
solenoid
electric motor
transformer
generator
Q.4.
A plant generating electric current
transmits alternating current at high voltages, but is used at low voltages
transmits direct current at high voltages, but is used at low voltages
transmits alternating current at low voltages, but used at high voltages
transmits direct current at low voltages, but used at high voltages
Q.5.
To reverse current direction in a motor the conducted current goes
through the commutator to the armature
through the armature
through the brushes to the commutator
in the direction of rotation
Q.6.
What do electric generators do
transform mechanical energy to electrical energy
transform mechanical energy to sound
transform electrical energy to mechanical energy
transform electrical energy to potential energy
Q.7.
What type of equipment is used to measure the current induced when a wire passes through a magnetic field?
a transformer
a galvanometer
a generator
an insulated wire
Q.8.
When current running through a wire is placed in the field of a permanent magnet,
solar energy is transformed into light
electrical energy is transformed into sound
solar energy is transformed into mechanical energy
electrical energy is transformed into mechanical energy
Q.9.
What type of current is produced in a battery
induced
magnetic
alternating
direct
Q.10.
What type of materials are needed to create an electromagnet?
battery, light bulb, plastic straw
battery, coil of wire, iron core
generator, iron core, switch
switch, source of electricity, compass
Q.11.
Which way will NOT increase the strength of the magnetic field of an electromagent
increasing the current
using a stronger ferromagnetic core
winding the coils closer together
decreasing the number of loops
Q.12.
All permanent magnets have two
magnetic charges
magnetic fields
magnetic needles
magnetic poles
Q.13.
Like poles on a permanent magnet will
attract each other
repel each other
always interact
point in the same direction
Q.14.
The magnetic field lines around a bar magnet
are perfectly straight
are only perpendicular to the magnet
spread out from one pole and curve around to the other
cross back and forth over one another
Q.15.
Which poles on the earth change?
the North and South
the magnetic poles
the geographic poles
the telephone poles
Q.16.
What is known as the difference between the earth's magnetic pole and its geographic pole?
magnetic declination
magnetic difference
geographic decline
geographic increase
Q.17.
As earth's magnetic poles move what happens to the magnetic declination of a given location
it will always remain constant
it will return to zero
it will change
it will always double
Q.18.
Electric currents passing through wires will produce a(n)
solenoid
magnet
magnetic field
insulator
Q.19.
In a moving coil galvanometer, the deflection of the coil θ is related to the electric current i by the relation
i α tanθ
i α θ
i α θ2
i α θ3
Q.20.
A galvanometer ofΩ gives full scale deflection with 2mA current. To convert it into ammeter, the range ofA is connected with it. What is the required value of shunt?
0.1 Ω
0.2 Ω
0.01 Ω
0.02 Ω
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.