NUST NET SAMPLE PHYSICS QUESTIONS

National University of Sciences and Technology (NUST) is ranked among top engineering universities of Pakistan. NUST was established in 1991, they have many campuses in different cities but their main campus is in Islamabad. NUST was established with a goal of providing quality education to its students and to create better carrier opportunities for them so that they can succeed in their lives. Nust mainly focus on quality education that’s why their fee is quite high but they facilitate poor and needy students through need base scholarship. NUST NET registration is open now and entry test will start from 20^th Dec 2018. NUST has earned his status in a very short period of time through their dedication and hard work.

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TOPIC

Alternating Current

QUESTION

A DC battery can pass current continuously through?

1. Resistor
2. Capacitor
3. Inductor

OPTIONS

1. I only
2. I and II only
3. I and III only
4. I, II and III

CORRECT OPTION

I and III only

EXPLANATION

DC current cannot flow through a capacitor continuously because of the presence of an insulating medium between the plates of the capacitor.

TOPIC

Electromagnetism

QUESTION

A solenoid is to be designed to give B= 8pi T and maximum current 10 A. What should be the turns per unit length for that solenoid?

OPTIONS

1. 2 * 10⁴
2. 2 * 10⁶
3. 4 * 10⁴
4. 4 * 10⁶

CORRECT OPTION

2 * 10⁶

EXPLANATION

B = µ₀nl;

8pi = 4pi * 10^-7 * n * 10 gives n = 2 * 10⁶

TOPIC

Optics

QUESTION

A parallel beam of white light is incident normally on a different grating. It is noted that the second order and third order spectra partially overlap. Which wavelength in third order spectrum appears at the same angle as the wavelength of 600 nm in the second order spectrum?

OPTIONS

1. 300nm
2. 600nm
3. 400nm
4. 900nm

CORRECT OPTION

400nm

EXPLANATION

Note that nλ should be constant.

2 * 600 = 1200

Now 3 * x = 1200, solving gives x = 400nm

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