Quarterly EM Physics (1-6) one words Quiz

If π =3.14, then the value of π² is

• 9.8596

• 9.860

• 9.86

• 9.9

Which of the following pairs of physical quantities have same dimension?

• Force and power

• Torque and energy

• Torque and power

• Force and torque

The dimension of (μ₀ε₀)^-1/2 is

• Length

• Time

• Velocity

• Force

A ball is projected vertically upward with the velocity v. it comes back to ground in time t which v-t graph shows the motion correctly.

• a

• b

• c

• d

Two objects are projected at angle 30° and 60⁰ respectively with respect to horizontal direction the range of two objects are denoted as R_30° and R₆₀⁰ choose the correct relation from the following

• R_30° = R_60⁰

• R_30° = 4 R_60⁰

• R_30° = R_60⁰/2

• R_30° = 2 R_60⁰

If the velocity is v= 2i+t²j-9k, then the magnitude of acceleration St t=0.5s is

• 1 ms^-2

• 2ms^-2

• Zero

• -1ms^-2

When a car takes a sudden left turn in the curved road passengers are pushed towards the right due to

• Inertia of direction

• Inertia of motion

• Inertia of rest

• Absence of inertia

The centrifugal force appears to exist

• Only in inertial frame

• Only in rotational frame

• In any accelerated frame

• Both in inertial and non inertial frame

An object of mass m begins to move on the plane inclined at an angle ϴ the coefficient of static friction of inclined surface is μ_s. The maximum static friction experienced by mass is

• mg

• μ_s mg

• μ_s mg sin θ

• μ_s mg cos θ

A ball of mass 1 kg and another mass 2 kg are dropped from a tall building whose height is 80 m after a fall of 40 m each toward Earth their respective kinetic energy will be in the ratio of

• √2:1

• 1: √2

• 2:1

• 1:2