# Physics Part 2 Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to Physics. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz. Q 1 - Optical fiber is preferably used in communication because …

A - Optical fiber is secure

B - Optical fiber is efficient

C - Optical fiber uses wireless technology

D - a & b

### Explanation

Optical fiber is one of the best mediums of transferring information in the present world.

Q 2 - Who among the following has popularized the compound microscope especially among the biologists’ community?

A - Antonie van Leeuwenhoek

B - August Köhler

C - Frits Zernike

D - Cornelis Drebbel

### Explanation

N/A

Q 3 - The measuring unit of a magnetic flux is:

A - Weber

B - Siemens

C - Tesla

D - Henry

### Explanation

Weber is the measuring unit of a magnetic flux.

Q 4 - Bernoulli's theorem is related to …

A - Viscosity

B - Elasticity

C - Surface tension

D - Electric current

### Explanation

Bernoulli’s principle defines the relationships among the pressure, velocity, and elevation in a moving fluid.

### Explanation

N/A

Q 6 - If you throw water on oily surface, then water does not stick with that because of …

A - Surface tension

B - Viscosity

D - Water does not mix with oil

N/A

N/A

### Explanation

Water molecules are electrically charged and hence they get attracted towards each other.

Q 9 - In terms of metric (SI) Unit, 1 light year =

A - 9.4607 × 1015 m

B - 9.4607 × 1015 km

C - 6.4607 × 1015 m

D - 9.4607 × 1018 m

### Explanation

In terms of astronomical unit, 1 light year = 6.3241 × 104 au.

Q 10 - Who had given the ‘Law of Electric resistance?’

B - Ohm

C - Weber

D - Kelvin

### Explanation

It was Georg Simon Ohm who first conceptualized the law of electric resistance.

Q 11 - Which among the following is not a scalar?

A - Mass

B - Speed

C - Volume

D - Velocity

### Explanation

Velocity is a vector.

Q 12 - Consider the following statements:

1. The value of gravitational force decreases due to rotation of the earth.

2. If the angular speed of the earth becomes 17 times of the present value, then the weight of body on equator will be zero.

Choose the correct answer from the codes given below:

A - Only 1

B - Only 2

C - Both

D - Neither 1 nor 2

### Explanation

N/A

Q 13 - Who among the following has discovered y-Rays?

A - Henry Becqueral

B - W Rontgen

C - Ritter

D - Newton

### Explanation

N/A

Q 14 - The branch of physics that analyzes the relationship between electrostatic and magnetic fields is known as:

A - Acoustics

B - Atomic Physics

C - Electrodynamics

D - Mechanics

### Explanation

Electrodynamics studies and analyzes the relationship between electrostatic and magnetic fields.

N/A

### Explanation

N/A

Q 17 - The sound frequency greater than the audible range i.e. (20,000 Hz) is known as …

A - Ultrasonic

B - Infrasonic

C - Hypersonic

D - Hyposonic

### Explanation

Anything above the frequencies of audible sound is known as ultrasonic.

Q 18 - Consider the following statements:

1. Viscosity of an ideal fluid is zero.

2. Viscosity of fluid is measured by its coefficient of viscosity.

Choose the correct answer from the codes given below:

A - Only 1

B - Only 2

C - Both

D - Neither 1 nor 2

### Explanation

N/A

Q 19 - Who had given the ‘Principle of Relativity?’

A - Marconi

B - Einstein

C - Rutherford

D - Dirac

### Explanation

It was Albert Einstein who propounded the principle of relativity.

Q 20 - Which among the following is used to determine the speed of an aircraft?

A - Periscope

B - Manometer

C - Machmeter

D - Kymograph