Four numbers are chosen at random (without replacement) from the set {l, 2, 3, ... , 20}. Statement I The probability that the chosen numbers... View Article
Why do we use slip rings in motors? A slip ring motor has the following advantages. It uses a low current to start The starting power is... View Article
Is pressure directly proportional to volume? No!! According to Boyle’s law, at a constant temperature, the volume of the given amount of gas is... View Article
How is a dark fringe formed? The dark fringes are formed due to destructive interference. Interference is said to be destructive if the resultant... View Article
What is meant by capillary depression? When the cohesive force between the molecules of the liquid is greater than the adhesive force between the... View Article
Can we touch real image? Real images are formed by the intersection of the rays. The light rays intersect after reflection from the mirror or... View Article
How inverted image is formed?Inverted image means the image is upside down compared to the object. The real images formed by the concave mirrors... View Article
Why thick copper strips are used in meter bridge? The connection between the resistors in the metre bridge is done using thick copper wires.... View Article
What is stiffness modulus? Young’s modulus is also called stiffness modulus. A stiff material has a high value of Young’s modulus. Young’s... View Article
What will happen if there is no thermal equilibrium? When there is no thermal equilibrium between the system there will be heat flow between the... View Article
What is forced frequency? Forced frequency is the frequency of the vibration generated by some fault in the machine, unbalance, misalignment etc.... View Article
Do longitudinal waves have a frequency? Yes, longitudinal waves have frequency. The frequency of the longitudinal wave is the number of... View Article
Is resonance energy positive or negative? The resonance energy of any compound will always be negative. The resonance energy is the difference... View Article
Electrolysis is the process of breaking down ionic substances into simpler substances by passing an electric current through them. Which ions... View Article
Why BJT is called transistor? BJT or Bipolar junction transistor is a type of transistor that uses both electrons and holes as charge carriers.... View Article
What is the formula of an ammeter? The ammeter is a device used to measure the current. The two leads of the ammeter must be connected in series... View Article
How do you wire a transistor as a switch? For connecting the transistor as a switch in a circuit, the output of the device that will switch on... View Article
Does increasing pressure increase the rate of reaction? Increasing the pressure of the gaseous reactants increases the rate of the reaction. When... View Article
