Indian National Physics Olympiad (INPhO)

Description: The Indian National Physics Olympiad (INPhO) is a national level physics competition for high school students in India. It is held annually and is organized by the Homi Bhabha Centre for Science Education (HBCSE). The competition is open to students who are in Class 11 or Class 12 and have a strong interest in physics. The INPhO is a three-tier competition, with the first tier being a written exam held at the state level. The top students from each state are then invited to participate in the second tier, which is a written exam held at the national level. The top students from the second tier are then invited to participate in the third tier, which is a practical exam held at the national level. The winners of the INPhO are awarded medals and certificates, and they are also eligible to represent India at the International Physics Olympiad (IPhO).
Number of Questions: 15
Created by:
Tags: physics olympiad inpho
Attempted 0/15 Correct 0 Score 0

Which of the following is not a fundamental force in physics?

  1. Gravitational force

  2. Electromagnetic force

  3. Strong nuclear force

  4. Weak nuclear force

  5. Centripetal force


Correct Option: E
Explanation:

Centripetal force is not a fundamental force in physics. It is a force that acts on an object moving in a circular path and is directed towards the center of the circle.

What is the SI unit of mass?

  1. Kilogram

  2. Gram

  3. Pound

  4. Ounce

  5. Carat


Correct Option: A
Explanation:

The SI unit of mass is kilogram.

What is the formula for the centripetal force acting on an object moving in a circular path?

  1. $$F_c = mv^2/r$$

  2. $$F_c = mv^2r$$

  3. $$F_c = mr^2v$$

  4. $$F_c = mv/r$$

  5. $$F_c = mvr$$


Correct Option: A
Explanation:

The formula for the centripetal force acting on an object moving in a circular path is $$F_c = mv^2/r$$. Where m is the mass of the object, v is the velocity of the object, and r is the radius of the circular path.

What is the SI unit of length?

  1. Meter

  2. Centimeter

  3. Inch

  4. Foot

  5. Yard


Correct Option: A
Explanation:

The SI unit of length is meter.

What is the formula for the gravitational force between two objects?

  1. $$F_g = Gm_1m_2/r^2$$

  2. $$F_g = Gm_1m_2r^2$$

  3. $$F_g = Gm_1/r^2$$

  4. $$F_g = Gm_2/r^2$$

  5. $$F_g = Gm_1m_2r$$


Correct Option: A
Explanation:

The formula for the gravitational force between two objects is $$F_g = Gm_1m_2/r^2$$. Where G is the gravitational constant, m_1 and m_2 are the masses of the two objects, and r is the distance between the two objects.

What is the SI unit of time?

  1. Second

  2. Minute

  3. Hour

  4. Day

  5. Year


Correct Option: A
Explanation:

The SI unit of time is second.

What is the formula for the kinetic energy of an object?

  1. $$K = mv^2/2$$

  2. $$K = mv^2$$

  3. $$K = m^2v$$

  4. $$K = mv/2$$

  5. $$K = mvr$$


Correct Option: A
Explanation:

The formula for the kinetic energy of an object is $$K = mv^2/2$$. Where m is the mass of the object and v is the velocity of the object.

What is the SI unit of electric charge?

  1. Coulomb

  2. Ampere

  3. Volt

  4. Ohm

  5. Farad


Correct Option: A
Explanation:

The SI unit of electric charge is coulomb.

What is the formula for the electric force between two charges?

  1. $$F_e = kq_1q_2/r^2$$

  2. $$F_e = kq_1q_2r^2$$

  3. $$F_e = kq_1/r^2$$

  4. $$F_e = kq_2/r^2$$

  5. $$F_e = kq_1q_2r$$


Correct Option: A
Explanation:

The formula for the electric force between two charges is $$F_e = kq_1q_2/r^2$$. Where k is the Coulomb constant, q_1 and q_2 are the charges of the two objects, and r is the distance between the two objects.

What is the SI unit of electric potential?

  1. Volt

  2. Ampere

  3. Coulomb

  4. Ohm

  5. Farad


Correct Option: A
Explanation:

The SI unit of electric potential is volt.

What is the formula for the electric potential at a point due to a point charge?

  1. $$V = kq/r$$

  2. $$V = kq^2/r$$

  3. $$V = kq/r^2$$

  4. $$V = kq^2/r^2$$

  5. $$V = kqr$$


Correct Option: A
Explanation:

The formula for the electric potential at a point due to a point charge is $$V = kq/r$$. Where k is the Coulomb constant, q is the charge of the point charge, and r is the distance between the point charge and the point at which the electric potential is being measured.

What is the SI unit of electric current?

  1. Ampere

  2. Volt

  3. Coulomb

  4. Ohm

  5. Farad


Correct Option: A
Explanation:

The SI unit of electric current is ampere.

What is the formula for the electric current in a circuit?

  1. $$I = V/R$$

  2. $$I = VR$$

  3. $$I = V^2/R$$

  4. $$I = V/R^2$$

  5. $$I = VR^2$$


Correct Option: A
Explanation:

The formula for the electric current in a circuit is $$I = V/R$$. Where I is the electric current, V is the voltage across the circuit, and R is the resistance of the circuit.

What is the SI unit of resistance?

  1. Ohm

  2. Ampere

  3. Volt

  4. Coulomb

  5. Farad


Correct Option: A
Explanation:

The SI unit of resistance is ohm.

What is the formula for the resistance of a conductor?

  1. $$R = ho l/A$$

  2. $$R = ho lA$$

  3. $$R = ho/lA$$

  4. $$R = ho l^2/A$$

  5. $$R = ho A/l$$


Correct Option: A
Explanation:

The formula for the resistance of a conductor is $$R = ho l/A$$. Where R is the resistance, ho is the resistivity of the conductor, l is the length of the conductor, and A is the cross-sectional area of the conductor.

- Hide questions