Home
Class 12
PHYSICS
An experimenter measures the length of a...

An experimenter measures the length of a rod. In the caese listed, all motions are with respect to the lab and parallel to the length will be minimum?

A

The rod and the experimenter move with the same speed v in the same direction .

B

The rod and the experimneter move with the same speed v in opposite directions

C

The rod moves at speed v but the exprimenter satsy at rest.

D

The rod stays at rest but the experimenter moves with the speed v but the experimenter moves with the speed v.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • THE SPECIAL THEORY OF RELATIVITY

    HC VERMA|Exercise Objective 2|6 Videos
  • THE SPECIAL THEORY OF RELATIVITY

    HC VERMA|Exercise Exercise|1 Videos
  • THE SPECIAL THEORY OF RELATIVITY

    HC VERMA|Exercise Short answer|5 Videos
  • THE NUCLEOUS

    HC VERMA|Exercise Exercises|53 Videos
  • THERMAL AND CHEMICAL EFFECT OF ELECTRIC CURRENT

    HC VERMA|Exercise Exercises|24 Videos

Similar Questions

Explore conceptually related problems

A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it ?

A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?

A steel scale measures the length of a copper rod as l_(0) when both are at 20^(@)C , which is the calibration temperature for the scale . The scale reading when both are at 40^(@)C , is :-

If error in measurement of a length of a cube is 3%, what is error in area of its one side ?

The refractive index of transparent cylindrical rod is (2)/(root_3) . As shown in the figure the ray i incident at the mid point of its one end. For which angle of incidence, the ray become parallel to the length of rod ?

The density of a cube is measured by measuring its mass and the length of its sides. If the maximum errors in the measurement of mass and length are 3% and 2% , respectively, then find the maximum error in the measurement of the density of cube.

A charge Q is uniformly distributed over a rod of length l . Consider a hypothetical cube of edge l with the centre of the cube at one end of the rod. Find the minimum possible flux of the electric field through the entire surface of the cube.

A weightless rigid rod with a load at the end is hinged at point A to the wall so that it can rotate in all directions (Fig). The rod is kept in the horizontal position by a vertical inextensible thread of length 1, fixed at its midpoint. The load receives a momentum in the direction perpendicular to the plane of the figure. Determine the period T of small oscillations of the system.

The mean length of an object is 5 cm. Which of the following measurements is most accurate ?

What is the length of the image of the rod in mirror, according to the observer in air? (refractive index of the liquid is mu )