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# VITEEE Physics Test - 4

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## 35 Questions MCQ Test VITEEE: Subject Wise and Full Length MOCK Tests | VITEEE Physics Test - 4

VITEEE Physics Test - 4 for JEE 2023 is part of VITEEE: Subject Wise and Full Length MOCK Tests preparation. The VITEEE Physics Test - 4 questions and answers have been prepared according to the JEE exam syllabus.The VITEEE Physics Test - 4 MCQs are made for JEE 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for VITEEE Physics Test - 4 below.
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VITEEE Physics Test - 4 - Question 1

### A device which converts electrical energy into mechanical energy is

VITEEE Physics Test - 4 - Question 2

### According toMoseley's law, the frequency of a spectral line in X - ray spectrum varies as

VITEEE Physics Test - 4 - Question 3

### Fraunhofer spectrum is a

VITEEE Physics Test - 4 - Question 4

A cell of e.m.f. E is connected with an external resistance R, then p.d. across cell is V. The internal resistance of cell will be

Detailed Solution for VITEEE Physics Test - 4 - Question 4

VITEEE Physics Test - 4 - Question 5

The resistance of a cell does not depend upon

VITEEE Physics Test - 4 - Question 6

If sky wave with a frequency of 50 MHz is incident on D-region at an angle of 30o, then angle of refraction is

Detailed Solution for VITEEE Physics Test - 4 - Question 6

Given:

f = 50 MHz

The angle of incidence (I) = 30o

Sin i = Sin r

r = 30o

VITEEE Physics Test - 4 - Question 7

The resistance of a wire of iron is 10 ohms and temp. coefficient of resistivity is 5x10-3∕℃. At 20oC it carries 30 milliamperes of current. Keeping constant potential difference between its ends, the temperature of the wire is raised to 120oC. The current in milliamperes that flows in the wire is

VITEEE Physics Test - 4 - Question 8

A wire of resistance 1 Ω is stretched to double its length. The resistance will become

VITEEE Physics Test - 4 - Question 9

Choke coil works on the principle of

VITEEE Physics Test - 4 - Question 10

The wing span of an aeroplane is 36 m. If the plane is flying at 400 km/h, the e.m.f. induced between the wings tips is (assume V=4X10)

VITEEE Physics Test - 4 - Question 11

The electromagnetic waves are produced by

VITEEE Physics Test - 4 - Question 12

A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis, the total electric flux for the surface of the cylinder is

Detailed Solution for VITEEE Physics Test - 4 - Question 12

Total charge enclosed is zero

VITEEE Physics Test - 4 - Question 13

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

VITEEE Physics Test - 4 - Question 14

What will be the ratio of de Broglie wavelengths of proton and α-particle of same energy

Detailed Solution for VITEEE Physics Test - 4 - Question 14

VITEEE Physics Test - 4 - Question 15

A body of capacity 4 μ F is charged to 80V and another body of capacity 6 μ F is charged to 30V. When they are connected the energy lost by 4 μ F is

Detailed Solution for VITEEE Physics Test - 4 - Question 15

VITEEE Physics Test - 4 - Question 16

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

Detailed Solution for VITEEE Physics Test - 4 - Question 16

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

VITEEE Physics Test - 4 - Question 17

An electric dipole of dipole moment p is placed in uniform electric field of strength E. If θ is the angle between p and E, then potential energy of the dipole becomes maximum, when θ is

VITEEE Physics Test - 4 - Question 18

A capacitor of 10 μF charged up to 250 volts is connected in parallel with another capacitor of 5 μF charged up to 100 volts. The common potential is

VITEEE Physics Test - 4 - Question 19

Magnetic effect of current was discovered by

VITEEE Physics Test - 4 - Question 20

Substances which have identical chemical properties but differ in atomic weight are called

VITEEE Physics Test - 4 - Question 21

Number of neutrons in C12 and C14 are

VITEEE Physics Test - 4 - Question 22

In a nuclear reactor heavy water is used as a

VITEEE Physics Test - 4 - Question 23

The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately

VITEEE Physics Test - 4 - Question 24
A ray of light strikes a glass plate at an angle θ. If angle between the reflected and refracted rays is a right angle, then refractive index of the glass plate is given by
VITEEE Physics Test - 4 - Question 25
When Arsenic is added as an impurity to Silicon the resulting material is ---- semiconductor.
VITEEE Physics Test - 4 - Question 26
The potential barrier, in the depletion layer, is due to
VITEEE Physics Test - 4 - Question 27

When plate voltage in diode valve is increased from 100 volt to 150 volt then plate current increases from 7.5 mA to 12 mA. The dynamic plate resistance will be

VITEEE Physics Test - 4 - Question 28

A prism of refractive index ' μ ' and angle 'A' is placed in the minimum deviation position. If the angle of minimum deviation is 'A', then the value of 'A' in terms of ' μ ' is

VITEEE Physics Test - 4 - Question 29

In a good conductor the energy gap between the conduction band and the valence band is

VITEEE Physics Test - 4 - Question 30
When arsenic is added as an impurity to silicon, the resulting material is
VITEEE Physics Test - 4 - Question 31

To make P-type semiconductor, the impurity to be mixed with pure germanium will be

VITEEE Physics Test - 4 - Question 32

In forward bias the width of potential barrier in a p-n junction diode

VITEEE Physics Test - 4 - Question 33

In Young's experiment of double slit, the intensity of central bright band is ---- times the individual intensities of the interfering waves

VITEEE Physics Test - 4 - Question 34

Two waves of intensities I and 4 I superimpose, then maximum and minimum intensities are

Detailed Solution for VITEEE Physics Test - 4 - Question 34

VITEEE Physics Test - 4 - Question 35

If a star is moving towards the earth, then the spectrum lines are shifted towards

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