# NUST NET SAMPLE PHYSICS QUESTIONS

NUST or the National University of Science and Technology is one of the top rated Engineering University of Pakistan. Students from all over Pakistan desire to get admission in NUST Business and Engineering programs. NUST organize their own entry test commonly known as NET in order to get admission in NUST . NUST Entrance Test or NET is held three times a year. We recommend our students to apply in all three times and apply on the basis of best score. Students should clear their concepts in detail in order to get admission in NUST.

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Topic:

Physics of solids

Question:

A piece of Cu and another of Ge are cooled from room temp to -1500 C. The resistance of?

Options:

• Each of them increases
• Cu increases and that of Ge decreases
• Cu decrease and that of Ge increases
• Each of them decreases

Correct option:

Cu decrease and that of Ge increases

Explanation:

The resistivity of semiconductors increases with a decrease in the temperature while for conductors it decrease with a decrease in the temperature. As opposed to metals, semiconductors have high negative temperature.

Topic:

Alternating Current

Question:

A DC battery can pass current continuously through?

1. Resistor
2. Capacitor
3. Inductor

Options:

• I only
• I and II only
• I and III only
• 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:

Fluid Dynamics

Question:

Water hose with internal radius of 0.01m has water flowing at the rate of 10 kg per 20s. What is the water speed at the outlet? Density of water is 1000 kg/m3.

Options:

• 1.6m/s
• 8m/s
• 6m/s
• 8m/s

Correct Option:

1.6m/s

Explanation:

From continuity equation A*V = flow rate of water = volume/s;

Volume/s = mass/s * density = 0.5/1000;

A*V = 0.5/1000; A = 3.14 * (0.01)2;

V = 0.5/ (3.14*(0.01)2*1000) = 1.6m/s

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