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# VITEEE Physics Test - 5

## 40 Questions MCQ Test VITEEE: Subject Wise and Full Length MOCK Tests | VITEEE Physics Test - 5

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This mock test of VITEEE Physics Test - 5 for JEE helps you for every JEE entrance exam. This contains 40 Multiple Choice Questions for JEE VITEEE Physics Test - 5 (mcq) to study with solutions a complete question bank. The solved questions answers in this VITEEE Physics Test - 5 quiz give you a good mix of easy questions and tough questions. JEE students definitely take this VITEEE Physics Test - 5 exercise for a better result in the exam. You can find other VITEEE Physics Test - 5 extra questions, long questions & short questions for JEE on EduRev as well by searching above.
QUESTION: 1

### In photoelectric phenomenon, the number of photo electrons emitted depends on

Solution:

Photoelectric current depends on the intensity of incident light,
the number of photoelectrons emitted per second is directly proportional to the intensity of incident radiation.

QUESTION: 2

### A parallel plate condenser with oil between the plates (dielectric constant of oil K = 2) has a capacitance C. If the oil is removed, then capacitance of the capacitors becomes

Solution:

On removing the oil, the capacitance of the capacitor will become.
C ′ = C/K = C/2

QUESTION: 3

### A particle of mass 0. 6 gm and having charge of 25 nC is moving horizontally with a uniform velocity 1.2 x 104  ms-1 in a uniform magnetic field, then the value of the magnetic induction is (g = 10 m s-2 )

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QUESTION: 4

For electroplating a spoon, it is placed in the voltameter at

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QUESTION: 5

Consider telecommunication through optical fibres. Which of the following statements is not correct

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QUESTION: 6

The average power dissipated in a pure inductor of inductance L when an A.C. current is passing through it is

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QUESTION: 7

If an electron revolves in the path of a circle of radius of 0.5x 10-10  m at a frequency of 5 x 1015  cycles ∕ sec , the electric current in the circle is (charge of electron = 1.6 x 10-19  C )

Solution:
QUESTION: 8

A wire of radius r has resistance R. If it is stretched to a radius of 3r/4, its resistance becomes

Solution:

Let L1 be the length and A1 the area of crosssection of the original wire and L2, A2 be their values of the stretched wire
Since volume of the wire remains unchanged, we have

QUESTION: 9

The length of given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be

Solution:
QUESTION: 10

At what temperature, the resistance of a copper wire will become three times its value at 0oC ? (Temperature coefficient of resistance for copper = 4 x 10-3per oC)

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QUESTION: 11

If particles are moving with same velocity, then maximum de-Broglie's wavelength will be for

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QUESTION: 12

The core of a transformer is laminated so that

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QUESTION: 13

A solenoid of length 20 cm area of cross-section 4 cm2 and having 4000 turns is placed inside another solenoid of 2000 turns having a cross-section area 8 cm2 and length 10 cm. The mutual inductance of the system is

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QUESTION: 14

Which of the following waves have maximum wavelength?

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QUESTION: 15

Two coils are placed close to eachother. The mutual inductance of the pair of coils depends upon

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QUESTION: 16

Eight dipoles of charges of magnitude e are placed inside a cube. The total electric flux coming out of the cube will be

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QUESTION: 17

Two charges -10 C and + 10 C are placed 10cm apart. Potential at the centre of the line joining two charges is

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QUESTION: 18

Two equal charges, q each are placed at a distance of 2a, and a third charge -2q is placed at the mid point. The potential energy of the system is

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QUESTION: 19

If an uncharged capacitor is charged by connecting it to a battery, then the amount of energy lost as heat is

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QUESTION: 20
An electric dipole placed in a non-uniform electric field experiences
Solution:
QUESTION: 21

Two equal charges q each are placed at a distance of 2a. If a third charge-2q is placed at the mid-point, then potential energy of the system is

Solution:

QUESTION: 22

In β + decay process, the following changes take place inside the nucleus

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QUESTION: 23

A current carrying loop is free to return in a uniform magnetic field. The loop will then come into equilibrium when its plane is inclined at

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QUESTION: 24

Which of the following is more effective in inducing nuclear fission

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QUESTION: 25

What is the Q-value of the reaction
p + 7 Li → 4 He + 4 He
The atomic masses of 1 H , 4 H e and 7 L i are 1.007825 u, 4.002603 u and 7.016004 u respectively

Solution:
QUESTION: 26

The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is

Solution:

Work function W0 = hc/λ

QUESTION: 27
If work function of metal is 3 eV then threshold wavelength will be
Solution:
QUESTION: 28

The refractive index of a certain glass is 1.5, for a light of wavelength 6000 Å . When light (c = 3 x 108 m s-1)passed through this glass, its wavelength is

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QUESTION: 29
The spectrum obtained from a sodium vapour lamp is an example for
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QUESTION: 30

What is the current through an ideal PN-junction diode shown in figure below?

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QUESTION: 31

The minimum potential difference between the base and emitter required to switch a silicon transistor 'ON' is approximately

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QUESTION: 32

Application of a forward bias to a p-n junction

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QUESTION: 33

The intrinsic semiconductor becomes an insulator at

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QUESTION: 34
In a PN-junction
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QUESTION: 35

The potential barrier, in the depletion of layer, is due to

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QUESTION: 36

The impurity atom that should be added to the germanium to make it an n-type semiconductor, is

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QUESTION: 37

Doppler's effects in sound and light are

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QUESTION: 38

When a source of light is receding away from an observer, then the spectral lines will get displaced towards

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QUESTION: 39

Which of the following property of light waves is not observed in sound waves?

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QUESTION: 40

In young's double slit experiment, three light, blue, yellow and red are used successively. For which colour, will the fringe width be maximum?

Solution: