WorksheetsElectromagnetic Induction and AC
Total questions: 10
Worksheet time: 2mins
Electro motive force induced by motion of conductor across magnetic field is called
EMF
motional EMF
rotational EMF
static EMF
Square coil of side 16 cm having 200 turns rotating in magnetic field of 0.05 T with peak EMF of 12 V will produce angular velocity of
47 rad s-1
49 rad s-1
42 rad s-1
48 rad s-1
Self-induced EMF is sometimes also known as
induced EMF
deduce EMF
back EMF
both a and b
A moving conductor coil produces an induced e.m.f. This is in accordance with :
Lenz’s law
Faraday’s law
Coulomb’s law
Ampere’s law
According to the Lenz's law, if you pull the magnet away, then the induced current will
change the pull
go with pull
oppose the pull
both a and b
"A current carrying coil placed in magnetic field experiences force", device that proves this law is
DC generator
DC motor
AC generator
both a and b
The electric current in a circuit is given by i = 3t. The rms current for the period t=0 to t=1 ( t is in sec, i in ampere)
3 A
9 A
√3 A
∛3 A
In a series LCR circuit the voltage across resistance, capacitance and inductance is 10 V each. If the capacitance is short circuited , the voltage across the inductance will be:
10 / √2 V
1o V
10 √2 V
20 V
An inductor coil having some resistance is connected to an AC source . which of the following have zero average value over a cycle?
Induced EMF in the inductor
current
both a and b
neither a nor b
Change of current of 1 A s-1 causes EMF of 1 V to be equal to
1 H
1 V m-1
1 A
1 J
