JEE Main Physics Mock Test- 7

Question 1

In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45^o. The value of C is

Accepted Answer

1/2πf(2πfL+R)

Answer

1/πf(2πfL−R)

Answer

1/2πf(2πfL−R)

Answer

1/πf(2πfL+R)

Question 2

A hotwire ammeter reads 10 A in a a.c. circuit. The peak value of the current is

Accepted Answer

<p>10&radic;2 A</p>

Answer

Answer

<p>10/&radic;2 A</p>

Answer

<p>5/&radic;2 A</p>

Question 3

The average acceleration vector for a particle having a uniform circular motion is

Accepted Answer

A null vector

Answer

A constant vector of magnitude υ²/r

Answer

A vector of magnitude υ²/r directed normal to the plane of the given uniform circular motion

Answer

Equal to the instantaneous acceleration vector at the start of the motion

Question 4

The X-rays beams coming from an X-ray tube will be

Accepted Answer

Having all wavelength larger than a certain minimum wavelength

Answer

Monochromatic

Answer

Having all wavelength smaller than a certain minimum wavelength

Answer

Having all wavelength between certain minimum and maximum wavelength

Question 5

A dipole of dipole moment p̅ is placed in uniform electric field E̅, then torque acting on it is given by

Accepted Answer

τ̅ = p̅ x E̅

Answer

τ̅ = p̅ . E̅

Answer

τ̅ = p̅ + E̅

Answer

τ̅ = p̅ - E̅

Question 6

When two surfaces are coated with a lubricant, then they

Accepted Answer

slide upon each other

Answer

stick to each other

Answer

roll upon each other

Answer

are attracted towards each other

Question 7

Two pieces of a glass plate, placed one upon the other with a little water in between them, can not be separated easily, because of

Accepted Answer

surface tension

Answer

<h5>inertia</h5>

Answer

<h5>pressure</h5>

Answer

<h5>viscosity</h5>

Question 8

The gyromagnetic ratio of an electron of charge e and mass m is equal to

Accepted Answer

Answer

Answer

Answer

Question 9

An electric dipole is placed along the X-axis at the origin O. A point P is at a distance of 20 cm from this origin such that OP makes an angle π/3 with the X axis. If electric field at P makes an angle θ with X-axis, the value of θ is

Accepted Answer

π/3 + tan^-¹√3/2

Answer

Answer

Answer

tan^-1√3/2

Question 10

If the momentum of a body increases by 0.01% its kinetic energy will increase by

Accepted Answer

Answer

Answer

Answer

Question 11

In the following combinations of logic gates, the outputs of A, B and C are respectivley

Accepted Answer

Answer

Answer

Answer

Question 12

Find the maximum velocity for overturn for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2

Accepted Answer

Answer

Answer

Answer

Question 13

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

Accepted Answer

Answer

Answer

Answer

Question 14

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): We cannot think of a magnetic configuration with three poles.
Reason(R): A bar magnet does exert a torque on itself due to its own field.

Accepted Answer

Assertion is false but Reason is true.

Answer

Both Assertion and Reason are true and Reason is the correct explanation of assertion.

Answer

Both Assertion and Reason are true and Reason is not the correct explanation of assertion

Answer

Assertion is true but Reason is false.

Question 15

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Gravitational field intensity at the centre of ring is zero.
Reason(R): Net force at the centre of ring is zero.

Accepted Answer

Both Assertion and Reason are true and Reason is the correct explanation of assertion.

Answer

Both Assertion and Reason are true and Reason is not the correct explanation of assertion

Answer

Assertion is true but Reason is false.

Answer

Assertion is false but Reason is true.

Question 16

A disc is of mass M and radius r. The moment of inertia of it about an axis tangential to its edge and in plane of the disc or parallel to its diameter is

Accepted Answer

Answer

Answer

Answer

Question 17

Helium gas at 27^oC has a volume of 8 L. It is suddenly compressed to a volume of 1 L. The final temperature of the gas will be(γ = 5/3 )

Accepted Answer

Answer

Answer

Answer

Question 18

Faraday is the unit of

Accepted Answer

<h5>charge</h5>

Answer

Answer

Answer

<h5>energy</h5>

Question 19

A tuning fork produces waves in a medium. If the temperature of the medium changes, then which of the following will change

Accepted Answer

<h5>Wavelength</h5>

Answer

<h5>Amplitude</h5>

Answer

<h5>Frequency</h5>

Answer

Time-period

Question 20

The radionuclide ⁵⁶Mn is being produced in a cyclotron at a constant rate P by bombarding a manganese target with deutrons. ⁵⁶Mn has a half life of 2.5 hours and the target contains large number of only the stable manganese isotope ⁵⁵Mn. The reaction that produces ⁵⁶Mn is:

⁵⁵Mn + d →⁵⁶Mn+P

After being bombarded for a long time, the activity of ⁵⁶Mn becomes constant equal to 13.86×10¹⁰s⁻¹. (Use ln2 = 0.693; Avogadro number = 6×10²³; atomic weight of ⁵⁶Mn = 56gm/mole)

Q. After a long time bombardment, number of ⁵⁶Mn nuclei present in the target depends upon
(a) The number of ⁵⁶Mn nuclei present at the start of the process
(b) Half life of the ⁵⁶Mn
(c) The constant rate of production P

Accepted Answer

Only (b) and (c) are correct

Answer

All (a), (b) and (c) are correct

Answer

Only (a) and (b) are correct

Answer

Only (a) and (c) are correct

Question 21

After five half-lives percentage of original radioactive atoms left is:-

Accepted Answer

Question 22

In series LR circuit X_L = 3R. Now a capacitor with X_C = R is added in series. Ratio of new to old power factor is :-

Accepted Answer

Question 23

In a galvanometer, the deflection becomes one half when the galvanometer is shunted by a 20Ω resistor. The galvanometer resistance is

Accepted Answer

Question 24

If an objects is placed symmetrically between two plane mirrors, inclined at an angle of 72°, then the total number of images formed is :-

Accepted Answer

Question 25

A tuning fork gives 4 beats with 50cm length of a sonometer wire. If the length of the wire is shortened by 1cm, the number of beats is still the same. The frequency of the fork (in Hz) is :-

Accepted Answer

JEE Main & Advanced Physics Mock Test- 7 Free Online Test 2026

Full Mock Test & Solutions: JEE Main Physics Mock Test- 7 (25 Questions)

In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45^o. The value of C is

A hotwire ammeter reads 10 A in a a.c. circuit. The peak value of the current is

The average acceleration vector for a particle having a uniform circular motion is

The X-rays beams coming from an X-ray tube will be

A dipole of dipole moment p̅ is placed in uniform electric field E̅, then torque acting on it is given by

When two surfaces are coated with a lubricant, then they

Two pieces of a glass plate, placed one upon the other with a little water in between them, can not be separated easily, because of

The gyromagnetic ratio of an electron of charge e and mass m is equal to

An electric dipole is placed along the X-axis at the origin O. A point P is at a distance of 20 cm from this origin such that OP makes an angle π/3 with the X axis. If electric field at P makes an angle θ with X-axis, the value of θ is

If the momentum of a body increases by 0.01% its kinetic energy will increase by

In the following combinations of logic gates, the outputs of A, B and C are respectivley

Find the maximum velocity for overturn for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2

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

A disc is of mass M and radius r. The moment of inertia of it about an axis tangential to its edge and in plane of the disc or parallel to its diameter is

Helium gas at 27^oC has a volume of 8 L. It is suddenly compressed to a volume of 1 L. The final temperature of the gas will be(γ = 5/3 )

Faraday is the unit of

A tuning fork produces waves in a medium. If the temperature of the medium changes, then which of the following will change

After five half-lives percentage of original radioactive atoms left is:-

In series LR circuit X_L = 3R. Now a capacitor with X_C = R is added in series. Ratio of new to old power factor is :-

In a galvanometer, the deflection becomes one half when the galvanometer is shunted by a 20Ω resistor. The galvanometer resistance is

If an objects is placed symmetrically between two plane mirrors, inclined at an angle of 72°, then the total number of images formed is :-

A tuning fork gives 4 beats with 50cm length of a sonometer wire. If the length of the wire is shortened by 1cm, the number of beats is still the same. The frequency of the fork (in Hz) is :-

JEE Main & Advanced Mock Test Series 2026

JEE Main & Advanced Mock Test Series 2026

Top Courses for JEE

About this JEE Mock Test

Explore more JEE Resources

JEE Main & Advanced Physics Mock Test- 7 Free Online Test 2026

Full Mock Test & Solutions: JEE Main Physics Mock Test- 7 (25 Questions)

In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45o. The value of C is

A hotwire ammeter reads 10 A in a a.c. circuit. The peak value of the current is

The average acceleration vector for a particle having a uniform circular motion is

The X-rays beams coming from an X-ray tube will be

A dipole of dipole moment p̅ is placed in uniform electric field E̅, then torque acting on it is given by

When two surfaces are coated with a lubricant, then they

Two pieces of a glass plate, placed one upon the other with a little water in between them, can not be separated easily, because of

The gyromagnetic ratio of an electron of charge e and mass m is equal to

An electric dipole is placed along the X-axis at the origin O. A point P is at a distance of 20 cm from this origin such that OP makes an angle π/3 with the X axis. If electric field at P makes an angle θ with X-axis, the value of θ is

If the momentum of a body increases by 0.01% its kinetic energy will increase by

In the following combinations of logic gates, the outputs of A, B and C are respectivley

Find the maximum velocity for overturn for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2

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

A disc is of mass M and radius r. The moment of inertia of it about an axis tangential to its edge and in plane of the disc or parallel to its diameter is

Helium gas at 27oC has a volume of 8 L. It is suddenly compressed to a volume of 1 L. The final temperature of the gas will be(γ = 5/3 )

Faraday is the unit of

A tuning fork produces waves in a medium. If the temperature of the medium changes, then which of the following will change

After five half-lives percentage of original radioactive atoms left is:-

In series LR circuit XL = 3R. Now a capacitor with XC = R is added in series. Ratio of new to old power factor is :-

In a galvanometer, the deflection becomes one half when the galvanometer is shunted by a 20Ω resistor. The galvanometer resistance is

If an objects is placed symmetrically between two plane mirrors, inclined at an angle of 72°, then the total number of images formed is :-

A tuning fork gives 4 beats with 50cm length of a sonometer wire. If the length of the wire is shortened by 1cm, the number of beats is still the same. The frequency of the fork (in Hz) is :-

JEE Main & Advanced Mock Test Series 2026

JEE Main & Advanced Mock Test Series 2026

Top Courses for JEE

About this JEE Mock Test

Explore more JEE Resources

In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45^o. The value of C is

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

Helium gas at 27^oC has a volume of 8 L. It is suddenly compressed to a volume of 1 L. The final temperature of the gas will be(γ = 5/3 )

In series LR circuit X_L = 3R. Now a capacitor with X_C = R is added in series. Ratio of new to old power factor is :-