# Physics Part 1 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 - Consider the following statements:

1. In CFL, mercury vapor and phosphor are used to produce light.

2. In LED, semi-conductor material is used to produce light.

Choose the correct answer from the codes given below:

A - Only 1

B - Only 2

C - Both

D - Neither 1 nor 2

### Explanation

In comparison to LED, CFL is less energy efficient.

Q 2 - When air bubble put in water, it acts like …

A - Concave lens

B - Concave mirror

C - Convex lens

D - Convex mirror

### Explanation

N/A

Q 3 - Who had given the concept of ‘inertia?’

A - Galilee

B - Gilbert

C - Newton

D - Maxwell

### Explanation

The concept of inertia is given by Galileo Galilee.

Q 4 - A remote control of TV uses …………. waves to control the TV.

A - Infrared

B - Ultrasonic

D - Light wave

### Explanation

N/A

Q 5 - What will happen to the molecules of an object, if you start heating it?

A - It will lose energy

B - It will start moving

C - No change

D - It will become harder

N/A

### Explanation

Inertia is the tendency of an object to maintain its position i.e. if it is in rest, then remains at rest or if it is in motion, then remains in motion.

Q 7 - If energy transmits in the form of waves or particles is known as …

A - Conduction

B - Convection

D - Reflection

### Explanation

Q 8 - Creation of something from nothing is against the law of …

A - Constant proportions

B - Conservation of mass energy

C - Multiple proportion

D - Conservation of momentum

### Explanation

N/A

Q 9 - Which among the following laws explains the ‘spectrum of blackbody radiation?’

A - Planck's law

B - Wien's displacement law

C - Stefan–Boltzmann law

D - Charles's law

### Explanation

Planck explained the spectrum of blackbody radiation, which depends only on the respective object's temperature.

Q 10 - Who had given the ‘Law of Electromagnetic Induction?’

B - Ohm

C - Weber

D - Kelvin

### Explanation

It was Michael Faraday who has first given the law of electromagnetic induction.

Q 11 - Who had given the ‘Law of Electrolytic?’

B - Ohm

C - Weber

D - Kelvin

### Explanation

It was Michael Faraday who has first given the law of electrolytic.

Q 12 - Consider the following statements:

1. If a lift is stationary or moving with uniform speed (either upward or downward), the apparent weight of a body is equal to its true weight.

2. If the cord of the lift is broken and it is falling freely, then the weight of a body in the lift becomes zero.

Choose the correct answer from the codes given below:

A - Only 1

B - Only 2

C - Both

D - Neither 1 nor 2

### Explanation

Second statement defines the situation of weightlessness.

Q 13 - Who among the following has discovered Ultra-Violet Rays?

A - Henry Becqueral

B - W Rontgen

C - Ritter

D - Newton

### Explanation

Johann Ritter had discovered ultra-violet rays in 1801.

Q 14 - Who among the following first predicted that a communication satellite should be stationary in the geosynchronous orbit?

A - Clarck

B - Derek Abbott

D - Artem Alikhanian

### Explanation

It was Arthur C Clarck who first observed this fact.

Q 15 - Consider the following statements:

1. If density of a body is equal to density of liquid, then the body floats fully submerged (in the liquid) in neutral equilibrium.

2. When a body floats in neutral equilibrium, the weight of the body is equal to the weight of displaced liquid.

Choose the correct answer from the codes given below:

A - Only 1

B - Only 2

C - Both

D - Neither 1 nor 2

### Explanation

The above given statements define law of floatation.

Q 16 - Consider the following statements:

1. Energy possessed by a body due to its motion is known as kinetic energy.

2. The capacity of doing work developed in a body due to its position or configuration is known as potential energy.

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 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. Good conductors have loosely bond electrons.

2. Bad conductors or insulators have tightly bond electrons.

Choose the correct answer from the codes given below:

A - Only 1

B - Only 2

C - Both

D - Neither 1 nor 2

### Explanation

Electricity flows through free electron.

### Explanation

Wavemeter is an instrument that measures the wavelength of a radio wave.

Q 20 - Plants absorb …………………… colors (the most).

A - Red & Blue

B - Green & Red

C - Green & Blue

D - Yellow & Green