CUET · PHYSICS · PYQ PAPER 2025
Two inductor coils of self inductance \( L_1 \) and \( L_2 \) having same length and same area of cross-section are placed so close that effective flux in one coil is completely linked with the other. The mutual inductance between them is, is equal to:
- A \( L_1L_2 \)
- B \( \frac{L_1}{L_2} \)
- C \( (L_1L_2)^2 \)
- D \( \sqrt{L_1L_2} \)
Answer & Solution
Correct Answer
(D) \( \sqrt{L_1L_2} \)
Step-by-step Solution
Detailed explanation
Since the flux is completely linked, the coefficient of coupling is \(k=1\). Using the relation \(M=\) \(k \sqrt{L_1 L_2}\), the mutual inductance simplifies to \(M=\sqrt{L_1 L_2}\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- Arrange the de-Broglie wavelengths associated with the following in decreasing order: (Given: \( h = 6.6 \times 10^{-34} \, \text{J-s} \))
(A) an electron (mass \( 9 \times 10^{-31} \, \text{kg} \)) in the hydrogen atom moving with speed \( 3 \times 10^6 \, \text{m/s} \)
(B) a bullet (mass 0.04 kg) travelling at speed \( 10^3 \, \text{m/s} \)
(C) a ball (mass 0.06 kg) moving with speed 1.0 m/s
(D) a dust particle (mass \( 1.0 \times 10^{-9} \, \text{kg} \)) drifting with speed 3.3 m/s
Choose the correct answer from the options given below:CUET 2025 Medium - Choose the correct statement(s) from the following:
(A) With increasing reverse bias voltage, the barrier potential across the junction of p-n diode decreases.
(B) A p-type semiconductor can be obtained by doping Si or Ge with trivalent atoms.
(C) A rectifier rectifies dc voltages.
(D) Pure semiconductors are called extrinsic semiconductors.
Choose the correct answer from the options given below:CUET 2025 Hard - Three capacitors each of capacitance 9 pF are connected in series. The capacitance of the combination would be :CUET 2023 Hard
- Which of the following statements are correct?
A. The matter wave picture could not incorporate the Heisenberg's uncertainity principle.
B. The wave properties of electrons have been utilised in the design of electron microscope.
C. Electron diffraction experiments have verified and confirmed the wave nature of electrons.
D. Photons are not deflected by magnetic fields.
E. The photon energy is dependent of intensity of radiation.
Choose the correct answer from the options given below:CUET 2023 Medium - Voltage sensitivity of a moving coil galvanometer doesn't depend on :CUET 2025 Hard
- An electromagnet has stored 540 J of magnetic energy when a current of 6 A exists in its coil. What is the value of average emf induced, if the current is reduced to zero in 0.54s?CUET 2023 Medium
More PYQs from CUET
- If some blood cells are placed in a solution containing more than \(0 . 9 \% ( m / v ) N a C l\), then the water inside the cells will flow out of the cells and they will shrink. Such a solution is known asCUET 2025 Hard
- A resistance of \( 15\Omega \) is connected in series with an unknown resistance \( R_1 \). This combination is connected to one gap of a meter bridge, while a resistance \( R_2 \) is connected in the other gap. The balance point is at 50 cm. When \( 15\Omega \) is removed, the balance point shifts by 10 cm. The value of \( R_1 \) isCUET 2023 Hard
- A plane electromagnetic wave of frequency 50 MHz travels in free space in the X- direction. At a particular point in space and time, the magnetic field is 0.003 G in the Z-direction. The magnitude and direction of the electric field isCUET 2025 Medium
- Arrange the stages in the life cycle of Plasmodium after the bite of mosquito.
(A) gametocytes in human RBCs
(B) sporozoites in mosquito's salivary glands
(C) sporozoites in human liver
(D) Fertilization in gut of mosquito host
Choose the correct answer from the options given below:CUET 2023 Medium - Which one of the following structures is not the male sex accessory duct?CUET 2025 Medium
- The corner points of the feasible region determined by a system of linear constraints are (0,0), (0, 40), (20, 40), (60, 20), (60, 0). If the objective function is \(Z = 4x + 3y\) then which one of the following is true?CUET 2025 Hard