Which of the following is a non-contact force?
Friction
Tension
Gravity
Magnetic force
Correct Answer :
D. Magnetic force
Related Questions
What is the phenomenon where a wave superposes with another wave, resulting in a new wave pattern?
Reflection
Diffraction
Refraction
Interference
What is the SI unit of capacitance in the CGS system?
Farad
Statfarad
Ampere-second
Volt
What is the SI unit of magnetic flux in the CGS system?
Weber
Gauss
Tesla
Henry
What is the SI unit of electric potential energy?
Volt
Joule
Watt
Ohm
What is the process by which a material acquires a positive or negative charge by gaining or losing electrons?
Conduction
Induction
Charging by friction
Polarization
What is the unit of electric current in the CGS system?
Ampere
Coulomb
Statampere
Ohm
What is the process by which a material becomes magnetized when placed in a magnetic field?
Induction
Magnetization
Polarization
Ferromagnetism
What is the SI unit of intensity of sound?
Watt per square meter
Decibel
Hertz
Pascal
What is the SI unit of electric current?
Ampere
Volt
Ohm
Joule
Which law states that an object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an external force?
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Law of Gravitation
What is the SI unit of electric potential difference?
Volt
Ampere
Ohm
Watt
What is the SI unit of power?
Watt
Joule
Volt
Ampere
Which of the following is a measure of an object's resistance to changes in its linear motion?
Inertia
Momentum
Impulse
Damping coefficient
What is the formula for calculating electric power in a circuit?
P = VI
P = V²/R
P = I²R
P = V/R
What is the SI unit of electric charge in the MKS system?
Coulomb
Statcoulomb
Ampere
Franklin
Which of the following is a fundamental force of nature responsible for holding atomic nuclei together?
Electromagnetic force
Gravitational force
Weak nuclear force
Strong nuclear force
Which type of particle is negatively charged and orbits the nucleus of an atom?
Electron
Proton
Neutron
Positron
What is the SI unit of inductance?
Henry
Farad
Ohm
Volt
Which of the following statements about nuclear fusion is true?
It releases energy when light nuclei combine to form heavier nuclei.
It is the process that powers stars.
It is a type of radioactive decay.
It involves the emission of beta particles.
Which type of nuclear decay releases a beta particle?
Alpha decay
Beta decay
Gamma decay
Electron capture
What is the acceleration due to gravity on the surface of the Earth?
9.8 m/s²
6.67 × 10^-11 Nm²/kg²
3.00 × 10^8 m/s
1.6 m/s²
Which law states that the total electric charge in a closed system is constant?
Coulomb's Law
Ohm's Law
Conservation of Charge
Ampere's Law
What is the SI unit of heat energy?
Calorie
Joule
Newton-meter
Watt
Which of the following statements about kinetic friction is true?
It always opposes motion.
It is independent of the normal force.
It is greater than static friction.
It depends on the velocity of the object.
Which of the following statements about electric fields is true?
Electric fields always point towards positive charges.
Electric fields are vectors and have both magnitude and direction.
Electric fields only exist inside conductors.
Electric fields do not interact with magnetic fields.
Which of the following statements about waves is true?
Longitudinal waves require a medium for propagation.
Transverse waves have oscillations perpendicular to the direction of wave motion.
Electromagnetic waves are an example of mechanical waves.
Sound waves are an example of electromagnetic waves.
Which law states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them?
Coulomb's Law
Ohm's Law
Ampere's Law
Faraday's Law
Which type of lens is thicker in the center and thinner at the edges?
Convex lens
Concave lens
Plano-convex lens
Plano-concave lens
What is the process by which a material becomes electrically charged when brought in contact with a charged object?
Conduction
Induction
Charging by friction
Polarization
Which of the following statements about wave speed is true?
It is determined by frequency and wavelength.
It is independent of the medium through which the wave travels.
It is inversely proportional to amplitude.
It is a scalar quantity.