List of practice Questions

In an AM wave, the information is contained within

In alumino thermite process which of the following is reduced :

In aluminothermic process, aluminium acts as :

In an a.c. circuit, V and I are given by V = 100 sin (100t) volt I = 100 sin (100t + $\pi$/3) mA Then the power dissipated in the circuit is

In an $A.P$., if $m^{th}$ term is $n$ and the $n^{th}$ term is $m$, where $m \ne n$, then find its $p^{th}$ term.

In alcoholic fermentation, NAD+ is produced during the

In Alum : $ { K2SO4 . Al2(SO4)3. 24H2O}$ Which metal can replace Al

In $\alpha$ - ray scattering, the scattering angle $(\theta)$ for impact parameter (b) to become zero is

In _________ aestivation, sepals or petals in a whorl just touch one another at the margins, without overlapping, as is found in _______ .

In AgBr, there can occur

In a Young's double slit experiment, 12 fringes are observed to be formed in a certain region of the screen when light of wavelength 600 nm is used. If the light of wavelength 400 nm is used, the number of fringes observed in the same region of the screen will be.

In $ABC$ $ABC$ packing if the number of atoms in the unit cell is $n$ then the number of tetrahedral voids in the unit cell is equal to

In acidic medium, $ {0.1 \, M \, KMno_4}$ may oxidise

In acidic medium, $MnO_4 ^{2-}$

In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is

In a transistor $10^8$ electrons enter at the emitter in $10^{-4}$ s, out of which 2% electron go to the base, the current transfer ratio in common base configuration is

In a transistor ($\beta$ = 45), the voltage across 5 $k \Omega$ load resistance in collector circuit is 5V. The base current is

In a survey of $400$ students in a school, $100$ were listed as taking apple juice, $150$ as taking orange juice and $75$ were listed as taking both apple as well as orange juice. Find how many students were taking neither apple juice nor orange juice?

In a survey of $60$ people, it was found that $25$ people read newspaper $H$, $26$ read newspaper $T$, $26$ read newspaper $I$, $9$ read both $H$ and $I$, $11$ read both $H$ and $T$, $8$ read both $T$ and $I$, $3$ read all three newspapers. Which of the following statements is/are true? : The number of people who read exactly one newspaper is $30$. : Exactly one of the newspaper read is $n(H) + n(T) + n(I) - 2\{n(H \cap I) + n(H \cap T) + n(T \cap T)\}$ $+ 3n(H \cap T \cap I)$

In a test, an examinee either guesses or copies or knows the answer to a multiple choice question with four choices. The probability that he makes a guess is $\frac{1}{3}$ . The probability that he copies is $\frac{1}{6}$ and the probability that his answer is correct given that he copied it is $\frac{1}{8}$ . The probability that he knew the answer to the question given that he correctly answered it, is

In a transformer $N_p$ = 500, $N_s$ = 5000. Input voltage is 20 V and frequency is 50 Hz. What are the output voltage and frequency ?

In a superheterodyne receiver, the IF is 455 kHz. If it is tuned 1200 kHz, the image frequency will be

In a survey of $100$ students, the number of students studying the various languages were found to be : English only $18$, English but not Hindi $23$, English and Sanskrit $8$, English $26$, Sanskrit $48$, Sanskrit and Hindi $8$, no language $24$. Find How many students were studying English and Hindi?

In a series $LCR$ circuit the voltage across an inductor, capacitor and resistor are $20\,V$, $20\,V$ and $40\,V$ respectively. The phase difference between the applied voltage and the current in the circuit is

In a series of 2n observations half of them equal a and remaining half equal - a. If the standard deviation of the observations is 2, then |a| equals