# PHYSICS Q & A ## Electromagnetic field questions and answers (physics)

1. What is electromagnetic field? Answer: Electromagnetic field is region where both electric force and magnetic force are felt by   charged particles. 2. What is the total force of electromagnetic field? Answer: the total force F of electromagnetic field is given by the vector sum of electric and magnetic forces. Fe and Fm respectively. That … ## crystalline, crystals definition, questions and answers

Crystalline and crystals 1. What is crystal? Answer:  A crystal is any solid substance that has definite melting point. 2. What is a crystalline compound? Answer:  A crystalline compound is a compound that has a definite shape peculiar to that compound 3. A substance of the same crystalline shape is referred to as what Answer: … ## Fundamentals of Physics questions and answers

Fundamentals of Physics questions and answers 1-10 Why is it that when you match a rug in your room you feel worn but when you match on the floor which is in the same room temperature with the rug you feel cold? Answer: It is because the cement floor is a good conductor of heat, …

## Physics question and answer on wave

Physics question and answer on wave 1 What is wave? Answer: Wave is  a disturbance which travels through a medium, transferring energy from one point to another, without permanently displacing the medium. Read also :  Electromagnetic wave examples and uses Physics question and answer on wave 2 What is the difference between Mechanical wave and …

## Thermal expansion question and answer

Thermal expansion: solid or liquid expand when heat is applied to them. The expansion of any material both liquid and solid depend on the nature of the substance. Thermal expansion question and answer 1 Define the followings (a), Linear expansivity, (b). Cubic or expansivity a nd  (c). Superficial expansivity Answer (a) Linear expansity os solid …

## Physics: specific heat capacity questions and answers

specific heat capacity questions and answers 1 Define specific heat capacity and derive the mathematical formula. Answer The specific heat capacity is defined as the quantity of heat required to raise the temperature of a unit mass (1K)  of a body through a degree rise in temperature(1k). The formula of the specific heat capacity. Note …

## Physics: question and answer on elasticity

Physics: question and answer on elasticity and Hooke’s law 1 Elastic wire extended by 1.0cm when a load of 20g hangs from it. What additional load will be required to cause further extension of 2.0cm? Answer 1.0cm = 0.01m.  2.0cm = 0.02m The force exerted by 20g Convert the 20g to kg  and multiple it …

## Physics: Simple machine question and answers

Simple machine question and answer 1 . A machine has a velocity ratio 5 and 80% efficient. What effort should be needed to lift a load of 200N with the aid of the machine? Answer V.R = 5, Efficiency = 80% Effort needed = 50N Read also question and answer on momentum Simple machine question …

## Physics: questions and answers on momentum and gravity

questions  on momentum and gravity 1 t0 5 Momentum and gravity: Give the direction and magnitude of the net force acting on the followings (1)  drop of rain falling down with a constant speed (2) A cork of mass 10g floating on water (3)) A kite held stationary on the sky (4) A can moving …