Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics reflection of light in spherical mirrors focus and focal length spherical mirror formula and magnification reflection of light by curved surfaces

An object is placed at a distance of $50\ cm$ from a convex mirror. A plane mirror is placed in front of the convex mirror in such a way that it covers half of the convex mirror. If the distance between object and plane mirror is $30\ cm$ then there is no parallax between the images formed by two mirrors, the radius of curvature of convex mirror will be :

  1. $50\ cm$
  2. $25\ cm$
  3. $12.5\ cm$
  4. $100\ cm$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For the plane mirror, the image is formed 30 cm behind it. For the convex mirror, the object is at 50 cm. No parallax means the images coincide. This setup requires calculating the focal length based on the image position.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

A tennis ball and a cricket ball, both are stationary. To start motion in them

  1. a less force is required for the cricket ball than for the tennis ball

  2. a less force is required for the tennis ball than for the cricket ball

  3. same force is required for both the balls

  4. nothing can be said
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to Newton's laws of motion, an object with more mass requires more force to change the current state. Since, a cricket ball is heavier than a tennis ball, therefore, less force is required to start motion in tennis ball than in cricket ball.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

The tendency of a body to resist acceleration is called:

  1. Force

  2. Retardation

  3. Inertia

  4. mass
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. It is the tendency of objects to keep moving in a straight line at constant velocity.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

The mass of an object is a $\underline{                     }$ measure of inertia:

  1. quantitative

  2. qualitative

  3. absolute

  4. average
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.