The first law of thermodynamics is a statement of

• conservation of momentum

• conservation of mass

• conservation of energy

• conservation of temperature

In which direction does friction act

• Same to direction of motion

• Opposite to the direction of motion

• Perpendicular to direction of motion

• No specific direction

Newtons first law of motion is also called as

• law of inertia

• law of action and reaction

• law of force and acceleration

• law of gravation

Sound travels fastest through

• Air

• Water

• Steel

• Vacuum

Electric field inside the conductor is

• Maximum

• Zero

• Equal to magnetic field

• Depends on conductor's resistance

Unit Of Power

• Joule

• Newton

• Watt

• Pascal

The shape of parallel plate capacitor is

• square

• circular

• rectangular

• all of above

The Zener diode is primarily used in

• amplification

• oscillation

• voltage regulation

• current rectification

In semiconductor diode, the forward voltage drop across silicon is typically

• 0.1 V

• 0.7 V

• 1.2 V

• 2.0 V

Which type of wave is used in mobile communications?

• gamma rays

• radio waves

• X- Rays

• ultravoilet waves