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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The process of regaining of information from carrier wave at the receiver is termed asA. modulationB. transmissionC. propagationD. demodulation |
| Answer» Correct Answer - D | |
| 2. |
The output of a two input NOR gate is in state 1 when :-A. all input are highB. all inputs are lowC. only one of its inputs is highD. only one of its inputs is low |
| Answer» Correct Answer - B | |
| 3. |
In an oscillator, for sustained oscillations, Barkhausen criterion is `Abeta` equal to (A = voltage gain without feedback and `beta` = feedback factor)A. zeroB. less than 1C. oneD. infinity |
| Answer» Correct Answer - C | |
| 4. |
The resistance of an ideal voltmeter isA. low resistanceB. high resistanceC. infinite resistanceD. zero resistance |
| Answer» Correct Answer - C | |
| 5. |
The primary coil of an ideal stepup transformer has 100 turns and the transformer ratio is also 100. The input voltage and power are 220 V and 1100 W. Calculate (i) number of turns in secondary (ii) current in primary (iii) voltage across secondary (iv) current in secondary (v) power in secondary.A. 600B. 500C. 400D. 300 |
| Answer» Correct Answer - D | |
| 6. |
The upper atmosphere layer is known asA. stratosphereB. mesosphereC. troposphereD. inonosphere |
| Answer» Correct Answer - D | |
| 7. |
Nuclide having the same number of protons and also neutrons but differ in radioactivity are called asA. isobarsB. `alpha-`particleC. istopseD. `gamma-` particles |
| Answer» Correct Answer - C | |
| 8. |
Colour of light emitted by LED depends uponA. its forward biasB. its reverse biasC. the band gap of the material of semiconductorD. its size |
| Answer» Correct Answer - C | |
| 9. |
In photoelectric effect, the number of photoelectrons emitted is proportional to :A. varies inversely with frequencyB. varies directly with frequencyC. varies inversely with intensityD. varies idirectly with intensity |
| Answer» Correct Answer - D | |
| 10. |
The energy of a photon of wavelength `lamda` is given byA. `hc lamda`B. `(h lamda)/©`C. `(lamda)/(hc)`D. `(hc)/(lamda)` |
| Answer» Correct Answer - D | |
| 11. |
Find the wavelength of the emitted radiation,if electron in hydrogen atom jumps from third orbit to second orbit.A. `(27)/(32)lamda`B. `(32)/(27) lamda`C. `(2)/(3)lamda`D. `3/2 lamda` |
| Answer» Correct Answer - A | |
| 12. |
If numerical aperture of a microscope is increased, then itsA. resolving power decreasesB. limit of resolution decreasesC. resolving power remains constantD. limit of resolution increases |
| Answer» Correct Answer - B | |
| 13. |
Two parallel plates separated by distance d are kept at potential differenc V volt. A charge q of mass m enters in parallel plates with some velocity. The acceleration of the charge particle will beA. `(qV)/(dm)`B. `(dm)/(qV)`C. `(qm)/(dV)`D. `(dV)/(qm)` |
| Answer» Correct Answer - A | |
| 14. |
The electric intensity of outside a charged sphere of radius R at a distance `r (r gt R)` isA. increase in charge on sphere.B. increase in dielectric constant.C. decrease in the distance from the centre of sphere.D. decrease in square of distance from the centre of sphere. |
| Answer» Correct Answer - D | |
| 15. |
Surface density of charge on a sphere of radius R in terms of electric intensity E at a distance in free space is `(epsi_(0)` = permittivity of free space)A. `(sigma)/(in_(0))[(R)/(r)]^(2)`B. `(in_(0))/(sigma)[(R)/(r)]^(2)`C. `(R)/(r) [(sigma)/(in_(0))]^(2)`D. `(R)/(sigma) [(sigma)/(in_(0))]^(2)` |
| Answer» Correct Answer - A | |