The magnifying power of a compound microscope is high if
1. both the objective and the eyepiece has short focal lengths
2. both the objective and the eyepiece have long focal lengths
3. the objective has a short focal length and the eyepiece has a long focal length
4. the objective has a long focal length and the eyepiece has a short focal length
The magnifying power of a compound microscope is high if
1. both the objective and the eyepiece has short focal lengths
2. both the objective and the eyepiece have long focal lengths
3. the objective has a short focal length and the eyepiece has a long focal length
4. the objective has a long focal length and the eyepiece has a short focal length
Subtopic: Simple & Compound Microscope |
Please attempt this question first.
Hints
Please attempt this question first.
Hints
times
Subtopic: Introduction |
52%
Please attempt this question first.
Hints
An alternating voltage V = V0 sin ωt is applied across a circuit. As result flows in it. The power consumed per cycle is
1. zero
Subtopic: RMS & Average Values |
64%
Please attempt this question first.
Hints
. The angle of prism is A. If the angle of minimum deviation is equal to the angle of the prism, then the value of A is
Subtopic: Logic gates |
67%
Please attempt this question first.
Hints
The half-life of a radioactive substance is 10 days. This means that
1. The substance completely disintegrates in 20 days
2. The substance completely disintegrates in 40 days
3. 1/8 part of the mass of the substance will be left intact at the end of 40 days
4. 7/8 part of the mass of the substance disintegrates in 30 days
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
A source and an observer are moving towards each other with a speed equal to v/2, where v is the speed of sound. The source is emitting sound of frequency n. The frequency heard by one observer will be
1. zero
2. n
3. \(\frac{n}{3}\)
4. 3n
54%
Please attempt this question first.
Hints
Velocity of sound waves in air is 330 m/s. For a particular sound in air, a path difference of 40 cm is equivalent to phase difference of 1.6π. The frequency of the wave is
1. 165 Hz
2. 150 Hz
3. 660 Hz
4. 330 Hz
Subtopic: Speed of Sound |
59%
Please attempt this question first.
Hints
© 2025 GoodEd Technologies Pvt. Ltd.