NTPC CBT-2 Physics Quiz - 30

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Question 1:

Which one of the following is not the unit of energy?

Question 2:

Which of the following elements is used in circuit to block the directional current (DC) ?

Question 3:

What does X stands for in X-rays?

Question 4:

Which of the following does not have any effect on velocity of sound?

Question 5:

The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as–