Physics Past Questions and Answers

Calculate the reactance of the inductor in the circuit diagram shown above [\(\pi = \frac{22}{7}\)]

A 132\(\Omega\)
B 214\(\Omega\)
C 264\(\Omega\)
D 269\(\Omega\)

Question 3017:

Production of x-ray tube begins with

A Photo electric emission
B Collision of electrons
C Thermionic emission
D Field emission of electrons

Question 3018:

A nitrogen nucleus bombarded with an alpha particle produces an oxygen nucleus and a proton. The nuclear reaction for this process is \(^4_2H + ^{14}_2N \to ^{17}_{8}O + ^1_1H + Q\). Which of the following statements about the reaction is not correct?

A The bombardment results into a nucleus with greater proton number
B It is an induced nuclear reaction
C It is a natural radioactive decay
D The sum of the final nucleon numbers

Question 3019:

Electrons passing through crystals are diffracted because they

A Are repelled by the atoms in the crystal
B Are attracted by the atoms in the crystals
C Possess wave properties
D Are particles

Question 3020:

A ball thrown vertically upward reaches a maximum height of 50 m above the level of projection. Calculate the;
(i) time taken to reach the maximum height,
(ii) speed of the throw. [g = 10 ms\(^{-2}\)]