Start learning →

JEE Main General Knowledge — practice questions

Explore 58 free General Knowledge questions in JEE Main General Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise General Knowledge with Quill →

General Knowledge questions and exercises with answers

Showing questions 1–30 of 58.

Kirchhoff's Voltage Law for a loop is fundamentally a statement of conservation ofRead the answer and worked solution →According to Kirchhoff's Voltage Law, the algebraic sum of all potential differences around any closed loop isRead the answer and worked solution →Kirchhoff's Current Law at a junction is based on conservation of which physical quantity?Read the answer and worked solution →If the original dipole moment of a bar magnet is $M$, what will be the dipole moment of each piece after cutting it along a transverse axis?Read the answer and worked solution →A bar magnet is cut along a transverse axis. Its dipole moment then becomesRead the answer and worked solution →A bar magnet is cut along a transverse axis. What happens to its pole strength according to the notes?Read the answer and worked solution →According to the notes, permanent magnets are characterized by the fact that theyRead the answer and worked solution →Which of the following is listed as a property of a bar magnet in the notes?Read the answer and worked solution →When a bar magnet is freely suspended, its north pole points towardRead the answer and worked solution →Which interaction between two magnetic poles is correct?Read the answer and worked solution →In the representation of a bar magnet, if one end has pole strength $+m$, the other end has pole strengthRead the answer and worked solution →A bar magnet is best described asRead the answer and worked solution →Einstein's photoelectric equation is best written as ![](https://qallery.app/diagrams/v2_4a14ecc17692/img-007.jpeg)Read the answer and worked solution →The equivalent mass of a photon of frequency $\nu$ isRead the answer and worked solution →The momentum of a photon of wavelength $\lambda$ isRead the answer and worked solution →Which phenomenon listed in the notes is evidence for the particle nature of light?Read the answer and worked solution →When a single die is thrown once, the sample space isRead the answer and worked solution →A sequence of trials is called Bernoulli trials if the trials areRead the answer and worked solution →For a discrete random variable $X$ taking values $x_i$ with probabilities $p_i$, the mean $E(X)$ is given byRead the answer and worked solution →Bayes' theorem is primarily used toRead the answer and worked solution →Events $A$ and $B$ are independent. If $P(A)=0.3$ and $P(B)=0.5$, what is $P(A\cap B)$?Read the answer and worked solution →If $P(A)=0.5$ and $P(B/A)=0.4$, then by the multiplication theorem, $P(A\cap B)$ equalsRead the answer and worked solution →If a curve has slope $m$ at a point, then the slope of the normal at that point isRead the answer and worked solution →If $x$ and $y$ are given parametrically in terms of $t$, then $\dfrac{dy}{dx}$ isRead the answer and worked solution →If $y=f(g(x))$, then by the chain rule $\dfrac{dy}{dx}$ equalsRead the answer and worked solution →Which of the following standard limits is equal to $1$?Read the answer and worked solution →Which statement is always true for a differentiable function at a point?Read the answer and worked solution →Question 7: If the angle between vectors A and B is $\theta$, then the value of the product $(B\times A).A$ is equal toRead the answer and worked solution →Question 6: If the scalar and vector products of two vectors A and B are equal in magnitude, then the angle between the two vectors isRead the answer and worked solution →If the angle between vectors $\vec A$ and $\vec B$ is $90^\circ$, thenRead the answer and worked solution →

Worked practice questions

Kirchhoff's Voltage Law for a loop is fundamentally a statement of conservation of

  1. Charge
  2. Mass
  3. Energy
  4. Current
Show answer and solution

Correct answer: C. Energy

As a charge completes one closed loop and returns to its starting point, the net change in electric potential energy per unit charge must be zero. **Hence KVL is a direct consequence of conservation of energy.**

Open this question →

According to Kirchhoff's Voltage Law, the algebraic sum of all potential differences around any closed loop is

  1. Equal to the largest voltage in the loop
  2. Equal to the sum of resistive drops only
  3. Zero
  4. Always positive
Show answer and solution

Correct answer: C. Zero

Kirchhoff's Voltage Law states that the algebraic sum of emfs and potential drops around a closed loop is zero. This expresses conservation of energy in an electric circuit.

Open this question →

Kirchhoff's Current Law at a junction is based on conservation of which physical quantity?

  1. Energy
  2. Charge
  3. Momentum
  4. Potential difference
Show answer and solution

Correct answer: B. Charge

Kirchhoff's Current Law follows from conservation of charge. Since charge cannot accumulate at an ideal junction in steady state, total current entering the node equals total current leaving it.

Open this question →

How to practise

  1. Choose a General Knowledge question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with General Knowledge practice for JEE Main. Read explanations as you go. No signup form needed to start.

Practise General Knowledge →