# Which of the following are found in extreme saline conditions? (1) Archaebacteria (2) Eubacteria (3) Cyanobacteria (4) Mycobacteria

Subtopic:  Kingdom Monera: Bacterial Classification |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

A spring of force constant k is cut into lengths of ratio 1:2:3. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k’’. Then k’: k’’ is:

1. 1:9

2. 1:11

3. 1:14

4. 1:6

Subtopic:  Combination of Springs |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

The ratio of resolving powers of an optical microscope for two wavelengths ${\lambda }_{1}$=4000 $\stackrel{0}{A}$ and  is:

1. 9:4

2. 3:2

3. 16:81

4. 8:27

Subtopic:  Resolving Power of Optical Devices |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

The two nearest harmonics of a tube closed at one end and open at the other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?

1. 20 Hz

2. 30 Hz

3. 40 Hz

4. 10 Hz

Subtopic:  Standing Waves |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

Consider a drop of rainwater having a mass of 1gm falling from a height of 1 km. It hits the ground with a speed of 50 m/s. Take 'g' constant with a value 10 m/s2. The work done by the
(i) gravitational force and the
(ii) resistive force of air is:

1. (i) 1.25 J (ii) -8.25 J

2. (i) 100 J (ii) 8.75 J

3. (i) 10 J (ii) -8.75 J

4. (i) -10 J (ii) -8.75 J

Subtopic:  Work Energy Theorem |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

A physical quantity of the dimensions of length that can be formed out of c, G and $\frac{{e}^{2}}{4{\mathrm{\pi \epsilon }}_{\mathrm{o}}}$is [c is the velocity of light, G is the universal constant of gravitation and e is charge]:

1. ${c}^{2}{\left[G\frac{{e}^{2}}{4\pi {\epsilon }_{0}}\right]}^{\frac{1}{2}}$

2. $\frac{1}{{c}^{2}}{\left[\frac{{e}^{2}}{4G\pi {\epsilon }_{0}}\right]}^{\frac{1}{2}}$

3. $\frac{1}{c}G\frac{{e}^{2}}{4\pi {\epsilon }_{0}}$

4. $\frac{1}{{c}^{2}}{\left[G\frac{{e}^{2}}{4\pi {\epsilon }_{0}}\right]}^{\frac{1}{2}}$

Subtopic:  Dimensions |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

Two rods A and B of different materials are welded together as shown in the figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be:

1. $\frac{3\left({K}_{1}+{K}_{2}\right)}{2}$

2. ${K}_{1}+{K}_{2}$

3. $2\left({K}_{1}+{K}_{2}\right)$

4. $\frac{{K}_{1}+{K}_{2}}{2}$

Subtopic:  Conduction |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system:-

1. Decreases by a factor of 2

2. Remains the same

3. Increases by a factor of 2

4. Increases by a factor of 4

Subtopic:  Energy stored in Capacitor |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

In a common-emitter transistor amplifier, the audio signal voltage across the collector is 3V. The resistance of the collector is 3k$\Omega$. If the current gain is 100 and the base resistance is 2k$\Omega$, the voltage and power gain of the amplifier are:

1. 15 and 200

2. 150 and 15000

3. 20 and 2000

4. 200 and 1000

Subtopic:  Applications of Transistor |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot

Thermodynamic processes are indicated in the following diagram:

Match the following:

 Column-I Column-II P. Process I a. Adiabatic Q. Process II b. Isobaric R. Process III c. Isochoric S. Process IV d. Isothermal

 P Q R S 1. c a d b 2. c d b a 3. d b a c 4. a c d b
Subtopic:  Types of Processes |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh