Physics Practice MCQs

1-The relation (B. L)I=UI is called
a-Amperes law b-Ohm’s law
c-Gauss’s law d-Newton’s law

2-(B. L)i is equal to
a-UI b=UNI
c-UNI/2r d-U/I

3-The magnetic field of induction of Toroid is
a-UNI/2r b-UI/2r
c-U2r/NI d-2r/UI

4-The magnetic field of induction of solenoid is
a-Uin b-UI
c-Uin/2r d-2r/UnI

5- is a coil of an insulated copper wire
wound on a long cylinder.
a-solenoid b-Toroid
c-Battery cell d-Hollow cylinder

6- is a coil of an insulated copper wire
wound on a circular shape material.
a-Toroid b-Solenoid
c-Circuit d-Potentiometer

7-The dot product between tangential components
And the summation of all the components of length
is equal to product of and
a-U and I b-U and N
c-U and V d-U and R

8- (B. L)=UI here U is called
a-Permeability of free space
b-Permitivity of free space
c-Relative permitivity
d-Di-electric constant

9-The value of U is
a-4*10^-7weber/A.m b-4*106-7weber/A.m
c-4*10^-7weber/C.m d-4*10^7coulomb/weber.m

10-The unit of B is
a-Weber b-Coulomb
c-Ampere d-Ohm

11-Acording to Biot and Savart law the magnetic field
of induction is directly related with
a-Twice of the current.
b-Twice of the voltage.
c-Twice of the resistance.
d-Thrice of the voltage.

12-What does the relation B2I/r represents.
a-Biot and Savart law b-Faraday law
c-Lenz law d-Inverse square law

13-Acording to Biot and Savart law the magnetic field
of induction B is related to
a-1/r b-r
c-r^2 d-i/r^2

14-Acording to Biot and Savart law the equation
B=(constant)2I/r here constant is
a-U/4 b-4U/
c-U/4r d-4r/U

15- l=Circumference of a circle which is equal to
a-2r b-2r^2
c-r^2 d-4/3 r^3

16-The magnetic field of induction will be maximum
If
a-B and L are in same direction.
b-B and L are in opposite direction.
c-B and L are perpendicular.
d-B is zero

17-Ampere’s law was proposed by
a-Ampere b-Faraday
c-Newton d-Coulomb

18-Ampere’s law carries which variable quantity.
a-I b-V
c-R d-C

19-The magnetic field of induction will be minimum if
a-B and L are in same direction.
b-B and L are in opposite direction.
c-B and L are perpendicular.
d-B is zero

20-Magnetic flux are the lines of forces around a
a-charge b-magnet
c-electron d-positron