IIT-JEE Exam

A piece of ice (heat capacity = 2100 J kg–1 º C–1 and latent heat = 3.36 × 105 J kg–1) of mass m grams is at –
5ºC at atmospheric pressure. It is given 420 J of heat so that the ice starts melting. Finally when the ice–
water mixture is in equilibrium, it is found that 1 gm of ice has melted. Assuming there is no other heat
exchange in the process, the value of m is

Read Solution (Total 0)

IIT-JEE Other Question
When two identical batteries of internal resistance 1Ω each are connected in series across a resistor R, the
rate of heat produced in R is J1. When the same batteries are connected in parallel across R, the rate is J2. If
J1 = 2.25 J2 then the value of R in Ω is An α–particle and a proton are accelerated from rest by a potential difference of 100 V. After this, their de
Broglie wavelengths are p and α λ λ respectively. The ratio λp/λv , to the nearest integer, is