NDA General Ability 4 September 2022 | Physics Question 324 | General Science

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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

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

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

A pressure cooker cooks food faster by

increasing the boiling point of water

decreasing the boiling point of water

increasing the melting point of water

decreasing the melting point of water

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