Explanation

A short circuit is a condition where the resistance of a circuit is zero, or very close to zero.

This occurs when there is a direct connection between two points in a circuit, bypassing any resistance or load.

As a result, the current flows freely, and the voltage across the circuit is zero.

Explanation

Coulomb's Law most closely resembles Newton's Law of Gravitation.

• Both laws deal with forces between objects
• Both forces decrease with distance (inverse-square law)
• Mathematical formulas are similar in structure

F = k × (q1 × q2) / r^2 (Coulomb's Law)

F = G × (m1 × m2) / r^2 (Newton's Law of Gravitation)

Explanation

In simple harmonic motion (SHM), the object's maximum speed occurs when it passes through the equilibrium point, which is the midpoint of its oscillation.

Explanation

The correct option will be 2 milliamperes ( according to the NTS answer key).

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In reality, 2 mA typically causes a mild tingling sensation or a slight shock, but it is not enough to cause severe injury or put someone into a coma.

For a current to potentially cause a coma, it usually needs to be in the range of 50 to 100 mA.

Explanation

Gamma (γ) radiation consists of high-energy electromagnetic waves, such as X-rays or gamma rays, that travel in a straight line and are not affected by electric or magnetic fields.

Gamma radiation is a form of ionizing radiation and can travel several meters in air or several centimeters in dense materials before being absorbed.

Explanation

The velocity of light in a diamond is reduced due to the refractive index of the diamond. The refractive index (n) is related to the velocity of light (v) by the formula:

v = c / n

where c is the speed of light in vacuum (approximately 3x10^8 m/s).

Given the refractive index of diamond is 2.5, we can calculate the velocity of light in diamond as:

v = c / n = 3x10^8 m/s / 2.5 = 1.2x10^8 m/s

So, the correct answer is 1.2x10^8m/s!

Explanation

In an oscillating pendulum, the bob accelerates from its extreme position due to the gravitational force acting on it.

The gravitational force pulls the bob towards the equilibrium position, causing it to accelerate.

Explanation

Alpha (α) radiation consists of heavy, positively charged particles (alpha particles) that are emitted from the nucleus of an atom during certain types of radioactive decay.

Alpha particles are highly ionizing, meaning they can efficiently remove tightly bound electrons from atoms, resulting in the formation of ions.

Explanation

The Boolean expression for an OR gate is A + B, where A and B are the inputs.

This expression reads "A or B".

In Boolean algebra, the OR operation is represented by a plus sign (+) or a logical disjunction symbol (∨).

So, the expression A + B or A ∨ B represents the OR operation.

Explanation

Resistance is the property of a material or object that opposes the flow of electric charge (current) through it.

It is measured in ohms (Ω) and depends on the material, length, and cross-sectional area of the object.