CUET · PHYSICS · PYQ PAPER 2023
Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 \(\mu\)C each. If the two spheres are now joined by a conducting wire, the charge on the smaller sphere will be :
- A 5 \(\mu\)C
- B 10 \(\mu\)C
- C 15 \(\mu\)C
- D 20 \(\mu\)C
Answer & Solution
Correct Answer
(B) 10 \(\mu\)C
Step-by-step Solution
Detailed explanation
\( Q_{total} = 15 \text{ \(\mu\)C} + 15 \text{ \(\mu\)C} = 30 \text{ \(\mu\)C} \) \( Q_1' = Q_{total} \left( \frac{r_1}{r_1+r_2} \right) \) \( Q_1' = 30 \text{ \(\mu\)C} \left( \frac{5 \text{ cm}}{5 \text{ cm} + 10 \text{ cm}} \right) \) \( Q_1' = 10 \text{ \(\mu\)C} \)
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
- A magnet of magnetic moment \( 50 \hat{i} \text{ A m}^2 \) is placed along the X-axis in a magnetic field \( \vec{B} = (0.5 \hat{i} + 3.0 \hat{j}) \text{ T} \). The torque acting on it isCUET 2023 Hard
- A galvanometer shows full scale deflection for a current of 4 mA. It is converted into an ammeter of range from 0 to 8
A by using a shunt. The ratio of resistance of the galvanometer coil to the resistance of the shunt used is nearly:CUET 2025 Hard - The current in a coil falls from 10.0 A to 0.0 A in 0.1 s. If an average emf of 100 V is induced in the coil, then the self inductance of the coil is.CUET 2025 Hard
- An electron gun emits 3 \(\times 10^{16}\) electrons per second. What electric current does this correspond to ?CUET 2023 Hard
- Radiation of frequency \(2 v_0\) incident on a metal with threshold frequency \(v_0\) results in maximum kinetic energy of photoelectrons as :CUET 2024 Medium
- The magnitude of induced emf in a coil depends on the :CUET 2023 Easy
More PYQs from CUET
- If \(X\) is normal distribution random variable with mean \(\mu=10\) and standard deviation \(\sigma=2, Z\) is standard normal variable and \(F(Z)\) is cumulative distribution function, then which of the following are true?
[Given that \(F(1.5)=0.9332, F(3)=0.9986, F(2.25)=0.9878\) and \(F(1)=0.8413\) ]
(A) \(P(X<13)=0.9332\)
(B) \(P(X>16)=0.9986\)
(C) \(P(12<X<14.5)=0.1465\)
(D) \(P(X>8)=0.8413\)
Choose the correct answer from the options given below:CUET 2025 Medium - The number of photoelectrons emitted from a metal surface for incident light of frequency \(\nu\) (higher than the threshold frequency \(\nu_0\)) is directly proportional to :CUET 2023 Medium
- \(A\) and \(B\) are two independent events. The probability that both events \(A\) and \(B\) occur is \(\frac{1}{6}\) and the probability that neither of them occur is \(\frac{1}{3}\). If \(P(A)=x, P(B)=y\) then the value of \(x+y\) is.CUET 2025 Hard
- When a dielectric material placed in uniform electric field, which of the following option is NOT CORRECT:CUET 2023 Easy
- Let A be a square matrix of order 3, then \(|x A|\) is equal to:CUET 2023 Hard
- The area of the region bounded by the parabola \(y^2=8 x\) and the line \(x=2\) is:CUET 2023 Easy