Courses

# Physics Topic-wise Test - 8

## 45 Questions MCQ Test NEET Mock Test Series & Past Year Papers | Physics Topic-wise Test - 8

Description
This mock test of Physics Topic-wise Test - 8 for NEET helps you for every NEET entrance exam. This contains 45 Multiple Choice Questions for NEET Physics Topic-wise Test - 8 (mcq) to study with solutions a complete question bank. The solved questions answers in this Physics Topic-wise Test - 8 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this Physics Topic-wise Test - 8 exercise for a better result in the exam. You can find other Physics Topic-wise Test - 8 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

### Two spheres having radii of 5 cm and 10 cm bear identical charge of 6.6 nC. Find the potential of spheres after they have been connected by a conductor, assume that the spheres are at large distance from each other

Solution:
QUESTION: 4
Two point charge 36 and –16 microcoulomb are placed 10 cm aptart. At a point X, there is no resultant force on unit positive charge. ‘X’ will lie somewhere
between (see the diagram) Solution:
QUESTION: 5

If the surface density of charge be  σ electric field near the surface would be

Solution:
QUESTION: 6

A charged particle of mass 0.1 g is in equilibrium in an electric field E = 98 N/C. The charge on the particle is

Solution:
QUESTION: 7

An electric charge ‘q’ is lying at the open end of a cylindrical vessel. The flux coming out of the cylinder will be

Solution:
QUESTION: 8

The inward and outward electric flux for a closed surface in units of
N - m2/coulomb are respectively 8x103 and 4x103 Then the total charge inside the surface is

Solution:
QUESTION: 9

A bullet of mass 2g is having a charge of 2 μC.Through what potential difference must be accelerated, starting from rest, to acquire speed of 10 m/s?

Solution: QUESTION: 10

On moving a charge of 20 coloumbs by 2cm, 2J of work is done, then the potential difference between the points is

Solution:
QUESTION: 11

The capacitance of a parallel plate condenser does not dpened upon

Solution:
QUESTION: 12

A semi-circular are of radius ‘a’ is charged uniformly and the charge per unit length is  λ The electric field at its centre is

Solution:
QUESTION: 13
A parallel plate capacitor has plate separation ‘d’ and capacitance 25 nF. If a metallic foil of thickness (2/7)d is introduced between the plates, the capacitance would become
Solution:
QUESTION: 14

A condenser ‘A’ has a capacity of 15 μF when it is filled with a medium of dielectric constant 15. Another condenser has a capacity of 1 μF with air between the plates. Both are charged separately by a battery of 100V. After charging both are connected in parallel without the battery and dielectric material being removed. The common potential now is

Solution:
QUESTION: 15

The unit of permittivity of free space ∈0 is

Solution:
QUESTION: 16
Ampere hour is a unit of
Solution:
QUESTION: 17

Seven resistance are connected as shown in the figure. The equivalent resistance between A and B Solution:
QUESTION: 18

Two charge of magnitude q1 = 2x10-7 C and  q2 = 3x10-7 C are placed 10 cm apart. The electric field produced by  qon  q1 is

Solution:
QUESTION: 19

Six resistors each of value 10 Ω are connected to a 5 volt battery as shown in the figure. The reading of ammeter ‘A’ is Solution:
QUESTION: 20

The potential difference between points ‘A’ and‘B  (VB - VA)in the figure if R = 0.7 Ω is Solution:
QUESTION: 21
If 2% of the main current is to be passed through the galvanometer of resistance G. the resistance of shunt required is
Solution:
QUESTION: 22

If a wire of resistivity ρ  is streched to double its length, then its new resitivity will

Solution:
QUESTION: 23

The internal resistance of a primary cell is 4Ω It generates a current of 0.2 A in an external resistance of 21 ΩThe rate at which chemical energy is consumed in providing the current is

Solution:
QUESTION: 24

The relation between Faraday constant F, electron charge e, and Avogadro Number N is

Solution:
QUESTION: 25

In the circuit, as shown in Fig. The heat produced by 6 Ω resistance due to current flowing in it is 60 calories per second. The heat generated across 3-ohm resistance per second will be Solution:
QUESTION: 26

A 100W bulb B1 and two 60W bulb B2 and B3 are connected to a 250 V source as shown in the Fig. Now W1, W2 and W3 are the output powers of the bulbs B1 , B2 and B3 respectively ,Then Solution:
QUESTION: 27

A solenoid 30 cm long is made by winding 2000 loops of wire on an iron rod whose cross section is 1.5 cm2 If the relative permeability of the iron is 600, what is the self inductance of the solenoid

Solution:
QUESTION: 28
A thin bar magnet of length 2l and breadth 2b, pole strength p and magnetic moment M is divided into four equal parts with length and breadth of each part being half of the original magnet. Then the pole strength of each part is
Solution:
QUESTION: 29
Susceptibility is positive and small for a ........substance:
Solution:
QUESTION: 30

A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through The torque needed to maintain the needle in this position
will be

Solution:
QUESTION: 31

A charged particle of mass 10-3 kg and charge + 10-5coulomb enters a magnetic field of induction one tesla. If g = 10m/s2for what value of velocity it will pass straight through it without deflection?

Solution:
QUESTION: 32
Which one of the following graphs represents correctly the variation of the magnetic field (B) at an axial point,for a circular coil with the distance (x) of the point from the centre of the circular coil?
Solution:
QUESTION: 33

A bar magnet of magnetic moment μ is bent to form a semi-circle. Its magnetic moment will become

Solution:
QUESTION: 34

At a given place on the earth’s surface the horizontal component of magnetic field is  3.2 x 10-5 tesla and the resultant magnetic field is  6.4 x 10-5 tesla. The angle of dip at that place is:

Solution:
QUESTION: 35
The weight of a horizontal current carrying wire can be supported by a magnetic field which is
Solution:
QUESTION: 36

A short magnetic needle is pivoted in a uniform magnetic field of strength 1T. When another magnetic field of strength √3 T is applied to the needle in a perpendicular direction, the needle deflects through an angle θ where  θ  is

Solution:
QUESTION: 37
The mutual inductance of a pair of coils depends on
Solution:
QUESTION: 38
If two bulbs A(25W-220V) & B(100W-220V) are connected in series with the supply of 330 volt, which bulb will fuse?
Solution:
QUESTION: 39

An electron moving in a circular orbit of radius R with a period T is equivalent to a magnetic dipole of dipole moment

Solution:
QUESTION: 40

Current is flowing in a one turn circular coil. If the coil is bent into a two turn coil of smaller radius, then the magnetic field at the centre of the coil will become

Solution:
QUESTION: 41
A rectangular coil of wire having 10 turns with dimensions of 20cmx30cm rotates at a constant speed of 600 rpm in a magnetic field 0.10T. The axis of rotation is perpendicular to the field. The maximum emf produced is (approximately)
Solution:
QUESTION: 42

A copper rod moves parallel to the horizontal direction.The induced emf developed across its ends due to earths magnetic field will be maximum at the

Solution:
QUESTION: 43

The figure below shows a resistor and a capacitor connected in series with a 25 V rms alternation supply What is the r.m.s. potential difference between P and Y given that the r.m.s. potential difference between X and
P is 15 V?

Solution:
QUESTION: 44

The equation of an alternating voltage is E = 220 sin  (ωt   a π/6 )nd the equation of the current in the circuit is I = 10 sin (ωt  -  π/6)What is the impedance of the circuit?

Solution:
QUESTION: 45

In the circuit shown in Fig. the r.m.s currents I1, I2 and I3, are altered by a varying the frequency ƒ of the oscillator. The output voltage of the oscillator remains sinusoidal and has fixed amplitude.Which curves in Fig.
indicate correctly the variations with frequency of the current I1, I2 and I3?  Solution: