NDA General Ability 4 September 2022 | Physics Question 71 | General Science

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NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

Which one of the following statements about earthquake waves is not correct?

P waves move faster and are the first to arrive at the surface.

P waves can travel through gaseous, liquid and solid materials.

Seismographs located beyond 145° from epicentre can record the arrival of P waves.

P waves have maximum area covered under its shadow zone.

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

The commercial unit of electrical energy is kilowatt-hour (kWh), which is equal to

3.6 × 10⁶ J

3.6 × 10³ J

10³ J

1 J

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

Which one of the following statements regarding a current-carrying solenoid is not correct?

The magnetic field inside the solenoid is uniform.

The current-carrying solenoid behaves like a bar magnet.

The magnetic field inside the solenoid increases with increase in current.

If a soft iron bar is inserted inside the solenoid, the magnetic field remains the same.

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

An object is made of two equal parts by volume; one part has density ρ₀, and the other part has density 2ρ₀. What is the average density of the object?

3ρ₀

$\rm \frac{3}{2}\rho_0$

ρ₀

$\rm \frac{1}{2}\rho_0$

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