Courses

# VITEEE Physics Test - 7

## 40 Questions MCQ Test VITEEE: Subject Wise and Full Length MOCK Tests | VITEEE Physics Test - 7

Description
This mock test of VITEEE Physics Test - 7 for JEE helps you for every JEE entrance exam. This contains 40 Multiple Choice Questions for JEE VITEEE Physics Test - 7 (mcq) to study with solutions a complete question bank. The solved questions answers in this VITEEE Physics Test - 7 quiz give you a good mix of easy questions and tough questions. JEE students definitely take this VITEEE Physics Test - 7 exercise for a better result in the exam. You can find other VITEEE Physics Test - 7 extra questions, long questions & short questions for JEE on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

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

Solution:
QUESTION: 4
The quantity of electricity needed to liberate one gram equivalent of an element is
Solution:
QUESTION: 5

X - rays which can penetrate through longer distances in substances are called

Solution:
QUESTION: 6

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: 7

The temperature coefficient of resistivity of material is 0.0004/K. When the temperature of the material is increased by 50 oC , its resistivity increases by 2 x 10-8  ohm -meter. The initial resistivity of the material in ohm-meter is

Solution:
QUESTION: 8

A wire of length L is drawn such that its diameter is reduced to half of its original diameter. If the initial resistance of the wire were 10 Ω, its new resistance would be

Solution:
QUESTION: 9

A transformer is used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5A, the efficiency of the transformer is approximately

Solution:
QUESTION: 10

If the length of the wire is doubled and its area of cross section is decreased to half, then its resistance

Solution:
QUESTION: 11

A microammeter has a resistance of 100 Ω and full scale range of 50 μA. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination

Solution:
QUESTION: 12

The expected energy of the electrons at the absolute zero is called

Solution:
QUESTION: 13

The effective value of a.c. in a circuit is 10 A. The peak value of current is

Solution:
QUESTION: 14

In a current carrying long solenoid, the field produced does not depend upon

Solution:
QUESTION: 15

If the electric flux entering and leaving an enclosed surface respectively is φ1 and φ2 , the electric charge inside the surface will be

Solution:
QUESTION: 16

Which of the following radiations have the least wavelength?

Solution:
QUESTION: 17

Equal charges are given to two conducting spheres of different radii. The potential will

Solution:
QUESTION: 18

A charged particle begins to move from the origin in a region which has a uniform magnetic field in the x-direction and a uniform electric field in the y-direction. Its speed is ν, when it reaches the point (x,y,z). The speed (ν) will depend upon

Solution:
QUESTION: 19

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

Solution:
QUESTION: 20

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Solution:
QUESTION: 21

The capacitor of a parallel plate capacitor with no dielectric substance and a separation of 0.4 cm is 2 μF. The separation is reduced to half and it is filled with a substance of dielectric value 2.8. The new capacity of the capacitor is

Solution:
QUESTION: 22

In radioactive decay process, the negatively charged emitted β -particles are

Solution:
QUESTION: 23

The path of particle moving under the influence of a force fixed in magnitude and direction is

Solution:
QUESTION: 24

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

Solution:
QUESTION: 25
What is the stopping potential when the metal with work function 0.6 eV is illuminated with the light of 2 eV ?
Solution:
QUESTION: 26

An alpha nucleus of energy 1/2 mv2 bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to

Solution:
QUESTION: 27
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
Solution:
QUESTION: 28
Time of exposure for a photographic print is 10 second, when a lamp of 50 Cd is placed at 1 m from it. Then another lamp of luminous intensity I is used, and is kept at 2 m from it. If the time of exposure now is 20 s, the value of I in (in Cd) is :
Solution:
QUESTION: 29

Two plane mirrors inclined to each other at an angle 72o , what is the number of images formed?

Solution:
QUESTION: 30

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

Solution:
QUESTION: 31

Energy gap in a metal is

Solution:
QUESTION: 32

In a P-type semiconductor the electrical conduction is due to

Solution:
QUESTION: 33

In intrinsic semiconductor at room temperature, number of electrons and holes are

Solution:
QUESTION: 34

A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly

Solution:
QUESTION: 35

The p-n junction diode is used as

Solution:
QUESTION: 36

When Ge crystal are doped with phosphorus atom then it becomes

Solution:
QUESTION: 37

Light was producing interference have their amplitudes in the ratio 3:2. The intensity ratio of maximum and minimum of interference fringes is

Solution:
QUESTION: 38

The ray of light

Solution:
QUESTION: 39

For which property are electrons used in an electron microscope?

Solution:
QUESTION: 40

According to wave theory, light is a form of energy which travels through a medium in the form of

Solution: