Question
When will NPCI implement stricter UPI rules prohibiting
special characters in transaction IDs?Solution
The NPCI (National Payments Corporation of India) has mandated that UPI transactions containing special characters in transaction IDs will be declined starting February 1, 2025. This change, per guidelines (OC 193) issued in March 2024, ensures compliance with technical standards and prevents transaction failures due to formatting errors.
A pulse of light duration 10-5 s is absorbed fully by a little object initially at rest. If the power of this pulse is 45 × 10-3...
The wave nature of matter was proposed by:
What was invented by 'Zacharias Janssen'?
A cylindrical conductor of length L and radius R has its radius increasing linearly from R at one end to 2R at the other. A constant current I flows thr...
A sample contains equal numbers of two isotopes X and Y, each with half-lives of 10 days and 20 days respectively. What is the ratio of activities Aâ‚“ ...
An electron in a hydrogen atom de-excites from the 4th to the 2nd level. The wavelength of emitted photon falls in which series?
A capacitor filled with dielectric constant K is connected to a battery. If dielectric is removed, how much charge flows back?
A block of mass m rests on a smooth wedge of mass M, which in turn rests on a smooth horizontal surface. The wedge is accelerated horizontally with acc...
A sound wave of frequency 500 Hz travels at 340 m/s. Find its wavelength.
Which law states that the induced electromotive force (e.m.f.) is proportional to the rate of change of magnetic flux linkage?
