Explanation

• Potential energy is a measure of the energy an object has due to its position or state, and it determines how much work the object can perform.
• The amount of potential energy an object has is a function of its mass, height, and other factors.
• It can be converted into kinetic energy (the energy of motion) when the object is released or moved.
• For example, a ball at the top of a hill has a certain amount of potential energy due to its height, and as it rolls down the hill, this potential energy is converted into kinetic energy, allowing the ball to perform work (such as moving down the hill).

Explanation

- Frequency is defined as the number of cycles or oscillations per second.  

- SI unit: Hertz (Hz) = 1/second  

- Dimensional formula of frequency: [T⁻¹]  

- It is a scalar quantity and fundamental in wave and oscillation problems.

Explanation

The NOT gate (inverter) is the only basic logic gate that has one input and one output, and it outputs the opposite (inverted) value of the input.

Explanation

Volt (V) = Joule per Coulomb (J/C), meaning it measures the electric potential energy per unit charge.

This unit defines how much energy (J) is given to each Coulomb (C) of charge in a circuit.

Explanation

The unit of angular acceleration is radians per second squared (rad/s²).

This unit measures the rate at which an object's angular velocity (its rate of rotation) changes over time. 

Radians (rad): Represents an angle.

Seconds (s): Represents time. 

Explanation

A NAND gate outputs the NOT of the AND gate output.

It can be seen as an AND gate followed by a NOT gate.

AND gate: first processes the inputs.

NOT gate: then inverts the output of the AND gate.

Explanation

The operation used in rectification is "Conversion of AC to DC". 

Rectification is the process of converting alternating current (AC) into direct current (DC) by using devices like diodes, which only allow current to flow in one direction. 

Explanation

- i × i = 0  

- j × j = 0  

- k × k = 0

Because the cross product of any vector with itself is always zero.

So,  

i × i = j × j = k × k = 0

Explanation

To find the weight of an object, use the formula:

Weight (W) = mass (m) × acceleration due to gravity (g)

Given:  

- Mass, m = 20 kg  

- g ≈ 9.8 m/s²

Calculation:  

W = 20 × 9.8 = 196 Newtons

Explanation

 Stokes' Law applies to the drag force experienced by a small spherical object moving at low velocity through a viscous fluid.  

- Drag force, F = 6πηrv, is directly proportional to the fluid's viscosity (η), the sphere's radius (r), and its velocity (v).  

This is Stokes' law for drag force, where:  

- η = viscosity of the fluid  

- r = radius of the sphere  

- v = velocity of the sphere through the fluid