Physics Applications | MCQs

Explanation

The range of a projectile is maximized when sin2𝜃 = 1.

It occurs at an angle of 45∘ since 

sin90∘ = 1.

Explanation

During the isothermal process, the temperature remains constant throughout the process.

In an isothermal process, the temperature of the system stays constant while pressure and volume may change.

Explanation

An artificial radioactive element can be made by bombarding high energy particles on stable elements.

This process can induce radioactivity in the stable element.

This resulting in the formation of a new radioactive isotope.

Explanation

A diode characteristic curve is a plot between voltage and current.

It shows the relationship between the applied voltage across the diode and the resulting current.

It indicating the diode's behavior in both forward and reverse bias.

Explanation

The component of electronics that acts as a rectifier is a diode.

Diodes allow current to flow in one direction only.

It enabling the conversion of alternating current (A.C.) into direct current (D.C.) by blocking the reverse flow.

Explanation

Power (P) is defined as the rate at which work is done or energy is transferred. The formula to calculate power is:

P = W / t

Where:

W = work done (in Joules)

t = time (in seconds)

First, we need to calculate the work done (W) by multiplying the force (F) by the displacement (d):

W = F × d

= 2.0 N × 1.0 m ( converted 100 cm to 1.0 m)

= 2.0 J

Now, we can calculate the power output (P) by dividing the work done (W) by the time (t):

P = W / t

= 2.0 J / 4 s

= 0.5 W

So, the power output of the motor is 0.5 W.