physics

Which of the following phenomena supports the theory that waves have a particle nature?

A. electron diffraction B. photoelectric effect C. diffraction of light D. x-ray interference Correct Answer: Option C C. diffraction of…

6 years ago

Which of the following statements about the use of radioisotopes is not correct? They are used to

A. induce mutations in plants and animals to obtain new and improved varieties B. trace the paths of metabolic processes…

6 years ago

Which of the following particles are termed nucleons in a neutral atom?

A. protons and neutrons B. neutrons and electrons C. protons and electrons D. protons, electrons and neutrons Correct Answer: Option…

6 years ago

The minimum energy required to cause photoelectric emission when the surface of a metal is irradiated with electromagnetic radiation of suitable frequency is called?

A. critical energy B. ionization energy C. work function D. Planck's constant Correct Answer: Option C C. work function

6 years ago

A coil of inductance 0.12 H and resistance 4Ω, is connected across a 240V, 50Hz supply. Calculate the current through it. [π = 3.142]

A. 6.3A B. 33.3A C. 37.2A D. 40.0A Correct Answer: Option A A. 6.3A Explanation XL = 2πfL = 2…

6 years ago

Which of the following devices does not makes use of eddy current for its action? A/An

A. galvanometer B. speedometer C. induction furnace D. speedometer Correct Answer: Option A A. galvanometer

6 years ago

The capacitance of parallel plates capacitors varies?

A. inversely as the square of the distance between the plates B. directly as the square of the distance between…

6 years ago

Which of the following instruments is used to determine the accurate value of the electromotive force of a cell?

A. voltmeter B. meterbridge C. voltameter D. potentiometer Correct Answer: Option D D. potentiometer

6 years ago

When a person holds a negatively charges metal rod and stands bare-footed on the ground, how will the charges leak?

A. negative charges flow to the ground through the person's body B. positive charges flow from the ground through his…

6 years ago