Explanation

The process by which atoms gain or lose electrons is called Ionization.

Ionization is the process by which an atom acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes.

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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

A balloon is filled with a gas called helium.

while

A balloon filled with hydrogen gas moves in the upward direction

Explanation

• Kinematics is the study of motion.
• It describes position, velocity, and acceleration.
• It does not focus on the forces causing motion.
• Examples include linear motion, circular motion, and projectile motion.

Additional information

• Mechanics → broad branch of physics dealing with motion and forces.
• Dynamics → studies motion and the forces causing it.

Explanation

 In a p-n-p transistor, the collector current is slightly less than the emitter current.

This is because a small portion of the current flowing from the emitter to the base recombines with electrons in the base region, reducing the current that reaches the collector. 

Explanation

There are 5 planets visible without a telescope, Mercury, Venus, Mars, Jupiter and Saturn.

Explanation

A hydrogen-filled balloon expands as it rises and may even burst after rising very high in the atmosphere

As one goes high, the weight of the atmosphere above decreases and so does the pressure.

Thus for a balloon filled on the ground, the pressure inside the balloon exceeds that outside and thus it bursts.

Explanation

Number of moons in the planets

Saturn: 83

Jupiter: 92

Uranus: 27

Neptune: 14

Mars: 2

Earth: 1

Venus: 0

Mercury: 0

Explanation

Sir Isaac Newton was an English mathematician, physicist, astronomer, alchemist, theologian,

Author widely recognised as one of the greatest mathematicians

And physicists of all time and among the most influential scientists. 

Explanation

Sputnik 1 was the first artificial Earth satellite.

It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program.

ND2-03-2023