Physics Quiz

The electric potential inside a hollow conducting sphere is:

• Zero

• Constant and equal to the potential at the surface

• Decreases as we move towards the center

• Increases as we move towards the center

Kirchhoff's junction rule (current law) is based on the principle of:

• Conservation of energy

• Conservation of charge

• Conservation of momentum

• Conservation of angular momentum

The magnetic field at the center of a circular current-carrying loop is:

• Zero

• Perpendicular to the plane of the loop

• Tangential to the plane of the loop

• Along the direction of current

Which of the following electromagnetic waves has the shortest wavelength?

• Radio waves

• Microwaves

• Infrared waves

• Gamma rays

The phenomenon of interference is based on:

• Wave nature of light

• Particle nature of light

• Dual nature of light

• Polarization of light

The focal length of a convex lens is:

• Positive

• Negative

• Zero

• Depends on the object distance

The photoelectric effect demonstrates the:

• Wave nature of light

• Particle nature of light

• Dual nature of light

• Electromagnetic nature of light

Which of the following is NOT a semiconductor?

• Silicon

• Germanium

• Copper

• Gallium arsenide

In a nuclear fission reaction, the mass of the products is:

• Greater than the mass of the reactants

• Less than the mass of the reactants

• Equal to the mass of the reactants

• Zero

The working principle of a transformer is based on:

• Self-induction

• Mutual induction

• Ohm's law

• Kirchhoff's law