CUET · PHYSICS · PYQ PAPER 2025
A galvanometer of resistance 520 \( \Omega \) is shunted with 20 \( \Omega \) resistance to convert it into an ammeter. The resistance of the ammeter will be
- A 16.8 \( \Omega \)
- B 540 \( \Omega \)
- C 19.3 \( \Omega \)
- D 18 \( \Omega \)
Answer & Solution
Correct Answer
(C) 19.3 \( \Omega \)
Step-by-step Solution
Detailed explanation
\( R_{ammeter} = \frac{R_g \cdot R_s}{R_g + R_s} \) \( R_{ammeter} = \frac{520 \, \Omega \cdot 20 \, \Omega}{520 \, \Omega + 20 \, \Omega} \) \( R_{ammeter} = \frac{10400 \, \Omega^2}{540 \, \Omega} \) \( R_{ammeter} \approx 19.259 \, \Omega \)…
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 coil has an inductance of \( L = 0.02 \text{ H} \) and the current is increasing at the rate of \( \frac{dI}{dt} = 200 \text{ A/s} \). The emf induced in it, \( \epsilon \), is:CUET 2025 Medium
- A charge Q is divided into two parts, q and (Q-q). The repulsion between them is maximum when Q : q isCUET 2023 Easy
- An electron gun emits 3 \(\times 10^{16}\) electrons per second. What electric current does this correspond to ?CUET 2023 Hard
- The induced e.m.f in a coil rotating in a uniform magnetic field will increase if
A. Total number of turns in the coil decreases
B. Magnetic field increases
C. Speed of rotation of coil decreases
D. Area of the coil increases
Choose the correct answer from the options given below:CUET 2023 Easy - When copper and germanium are cooled from room temperature to 100 K, then :CUET 2023 Hard
- The power of the composite lens made of two thin lenses of focal lengths \(f_1\) and \(f_2\) placed in contact will be:CUET 2023 Easy
More PYQs from CUET
- Arrange the following events in correct sequence :
(A) Virus infects macrophages
(B) Viral DNA is produced by reverse transcriptase
(C) Viral DNA incorporates into host genome
(D) Viral RNA is introduced into macrophages
(E) New viruses are produced
Choose the correct answer from the options given below :CUET 2023 Hard - Consider the curve which is represented by the differential equation \(\frac{d y}{d x}=1+x+y+x y\). If it passes through the point \((0,0)\), then which of the following is/are true?
(A) it is a straight line.
(B) it is a parabola.
(C) it also passes through the point \(\left(-1, \frac{1}{\sqrt{e}}-1\right)\)
(D) Its equation is \(x y(x+1)\left(y-\frac{1}{\sqrt{e}}+1\right)=0\)
Choose the correct answer from the options given below :CUET 2025 Hard - Which one of the following sex determination systems is found in honey
bee?CUET 2025 Medium - Which of the following are correct?
(A) If \(A\) and \(B\) are symmetric matrices such that \(A B=B A\), then \(A B\) is symmetric.
(B) If \(A\) and \(B\) are symmetric matrices of the same order, then \((A+B)\) is a symmetric matrix.
(C) If \(A\) and \(B\) are symmetric matrices of the same order, then \((A B-B A)\) is a symmetric matrix.
(D) If \(A\) and \(B\) are symmetric matrices of the same order, then \((A B+B A)\) is a skew-symmetric matrix.
Choose the correct answer from the options given below :CUET 2025 Easy - Identify the correct combination of salient features of the genetic code.
(A) AUG has dual functions as it codes for methionine (met), and also act as initiator codon.
(B) Some amino acids are coded by more than one codon, hence the code is degenerate.
(C) UAA, UAG, UGG are stop terminator codons.
(D) The codon is read in mRNA in a continuous fashion and there are no punctuations.
Choose the correct answer from the options given below:CUET 2025 Easy - An element has a cubic close packing (ccp) structure with an edge length 297 pm . The density of mass \(=107.9 g / mol\).)
the element is (Given molar mass = \(107.9 g / mol\).)CUET 2023 Medium