CUET Free MOCK Test of Physics: Check knowledge for upcoming exam 2024

X-rays of wavelength λ = 1Å have frequency

A telescope has an objective lens of 0.1 m diameter and is situated at a distance of 500 m from two objects. What will be the minimum distance between these two objects which can be resolved by the telescope? The mean wavelength of light is 600 nm.

In a concave mirror, an object is placed at a distance x from the focus and the image is formed at a distance y from the focus. What is the focal length of the mirror?

A radioactive isotope has a half life of T years. How long (in years) will it take the activity to reduce to 3.125% of it's original value?

A parallel plate air capacitor has a capacity ‘C’, distance of separation between its plates is ‘x’ and potential difference applied across the plates is V. What is the force of attraction between the plates of the parallel plate air capacitor?

The refractive index of air with respect to glass 2/3. The refractive index of diamond will respect to air is 2.4. What will be the refractive index of glass with respect to diamond?

Which of the following combinations should be used for better tuning of an LCR circuit used for communication?

What is the approximate wavelength of the radiation emitted when the electron in an hydrogen atom jumps from n = ∞ to n = 3?

Which of the following statements are correct?
A. Moving charges produce a magnetic field in the surrounding space.
B. An instrument called the current balance is used to measure mechanical force between two parallel conductors.
C. The electron has an intrinsic magnetic moment, which is known as the orbital magnetic moment.
D. Magnetic field of several sources is the vector addition of magnetic field of each individual source.
E. The radius of the circular component of motion is called the radius of the helix.
Choose the correct answer from the options given below:

The capacitance of a capacitor is 4 μF and it's potential is 100 V. The energy released on discharging it fully will be

Figure below shows a plot of current I through the cross-section of a wire over a time interval of 12 s. How much charge flows through the wire during this time period?

Which of the following is not the property of β– ray?

A metal plate is getting heated. It can be because of
A. An alternating current is passing through the plate.
B. It is placed in a time varying magnetic field.
C. A direct current is passing through the plate.
D. It is placed in a space varying magnetic field, but does not vary with time
E. It is placed in a time constant magnetic field
Choose the correct answer from the options given below:

Which of the following statements are correct?
A. Two major types of resistors are wire bound resistors and carbon resistors.
B. Mobility is the drift velocity per unit electric field.
C. The internal resistance of dry cells is much lower than the common electrolytic cells.
D. In electrolytic liquids, electrons carry the electric current.
E. Potentiometer is unaffected by the internal resistance of the source.
Choose the correct answer from the options given below:

The electron in a hydrogen atom rises from its n = 1 state to n = 4 state by absorbing energy. The energy of the electron in the n = 1 state is –13.6 eV. How much energy is absorbed by the electron in transition?

When a number of capacitors are connected in parallel between two points increases, the equivalent capacitance

A semiconducting device is connected as shown in the figure A current is found to pass through the circuit. On reversing the polarity of the battery. The current in the circuit drops to almost zero. What is the device?

A proton and an alpha particle enter a uniform magnetic field with the same velocity and move along circular paths. The time period of the alpha particle will be:

At the time of sunset, the sun appears to be at an altitude higher than its actual position. This is because of

When a steady current flows in a metallic conductor of non-uniform cross section. Which of these quantities is constant along the conductor?
A. Current
B. Electric field
C. Drift speed
D. Current density E. Potential gradient
Choose the correct answer from the options given below:

The total charge of an electric dipole is (Where ‘q’ is the point charge on either side of the dipole and ‘e’ is the charge of an electron)

In a potentiometer arrangement, a cell of emf 1.5 V gives a balance point at 45.0 cm length of the wire. If the cell is replaced by another cell of emf 2.25 V. Where will the balance point shift to?

Which one of the following cannot be polarized?

For which of the following, a capacitor acts as an infinite resistance component in the circuit?

Which of the following gates can give AND gate by its repetitive use?

As per Bohr's model the energy (in eV) required to remove electron from ground state of Li⁺⁺ (doubly ionised lithium atom) is

When temperature of a ferromagnetic material is increased by 20%, what is the percentage change in its magnetic susceptibility?

A television transmitting antenna is 84 m tall. How much service area can it cover, if the receiving antenna is at the ground level?

There is a solenoid of length 1 m has a radius of 1 cm and is made up of 1000 tums. It carries a current of 10 A. The magnitude of magnetic field inside the solenoid is.

A resistance of 15 Ω is connected in series with an unknown resistance R₁. This combination is connected to one gap of a meter bridge, while a resistance R₂ is connected in the other gap. The balance point is at 50 cm. When 15 Ω is removed, the balance point shifts by 10 cm. The value of R₁ is

A charge Q is divided into two parts, q and (Q – q). The repulsion between them is maximum when Q : q is

The magnetic flux passing perpendicular to the plane of coil is changing according to the equation φ = 6t2 + 7t + 1, where ‘φ’ is in mWb and ‘t’ in sec. The magnitude of induced emf at t = 2 s is